***************************************************************************************************
* Legend: ! Bugfix, + New Features, * Changed, - Info Only 
* 


2.3.0:
-----
 * Prepare for Serendipity Styx 4.4.0 - expandable hooked sidebar links

2.2.1:
-----
 * Improve more markup indents for Styx 4.3.0+

2.2.0:
-----
 * Improve (Smarty) markup indent consistency for Styx 4.3.0+
 * Remove some outdated old "mysql" type conditions
 * Refactored for deprecated <big> HTML element

2.1.4:
-----
 * Improve and fix for strict_types

2.1.3:
-----
 * Better check for $serendipity['GET']['subpage'] on entry preview

2.1.2:
------

 * Fix lang constant typos [de, en]
 * Fix some more possible uninitialized variable checks
 * Removed an assignment in 2.1.0, found unnecessary by 2.1.1 fix

2.1.1:
------

 * Fix pulsating checkmark icon approve for quick-actions again for cases

2.1.0:
------

 * Mute strftime deprecation warnings until PHP 9
 * Improve more string functions for "Passing null to parameter of type string" deprecation warnings with PHP 8.1
 * Fix an undocumented parameter order usage, now being wrong with PHP 8
 * Add another DARK MODE rule for ical logs
 * Fix adminpath adding event calendar entries via this backend form
 * Fix pulsating checkmark icon approve for quick-actions

2.0.8:
------

 * Improve preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated with PHP 8.1

2.0.7:
------

 * Improve check for custom theme backend stylesheet for PHP 8

2.0.6:
------

 * Improve some DARK MODE table list and message colors

2.0.5:
------

 * Improve DARK MODE eventcal type colors

2.0.4:
2.0.3:
------

 * Improve DARK MODE tabs for start and visited

2.0.2:
------

 * Improve DARK MODE tabs

2.0.1:
------

 * Fix a possible admin variable in the frontend
 * Improve width of frontend form

2.0.0:
------

 * SQL and ALTER TABLE fix
 * Variable initialization fixes for PHP 8
 * Raises requirements
 * Preparations for Styx 3.5 DARK MODE

1.88:
-----

 * PHP 8 preparation fix

1.87:
----

 * Secure plugin_eventcal_entry.tpl, plugin_eventcal_app.tpl and plugin_eventcal_calweek.tpl target="_blank" link event URL
   If you have your own theme template file(s) please add the default rel="noopener" attribute.

1.86:
----

 * Use the defined constant for the compile dir

1.85:
----

 * Fix some uninitialized properties

1.84:
----

 * Fix is array events on empty

1.83:
----

 * Fix 1.82 stylesheet changes

1.82:
----

 * Fix some date formatting

1.81:
----

 * Added legal property bag information for gdpr/dsgvo

1.80:
----

 * Remove redundant security checks

1.79:
----

 * Iconfont accessibility fixes

1.78:
----

 * Optimize URI args load

v.1.76:
-------

 * Set plugin consistencies
 * Use load language API - extends required Serendipity version to v.1.6
 * Fix wrong template name for path replacements
 * Some styles use CSS images ...
   PLEASE NOTE:
      if you provide your own template (event)cal stylesheets
      remember to include them to your img/ directory.

v.1.75:
-------

 * Add selector for the eventwrapper sidebar month name title
 * Some more finetuned overwriting margins for the frontend


v.1.74:
-------

 * Prevent empty montharray loop with eventwrapper


v.1.73:
-------

 * Fix a backend inherit style to apply with event cal only


v.1.72:
-------

 * Add some minor CSS improvements for the frontend
 * Fixed db increment administration
 * Some more internal cleanup


v.1.71:
-------

 * Remove an old file for updaters, which could overwrite new settings
 * Some more frontend and theme specific CSS cleanup
 * Moved eventcal CSS to apply after theme CSS
 * Added new config Option, to allow monthly events faked sidebar plugin
   output with plugin_eventwrapper. (Do not set true, if not using this latter!)


v.1.70:
-------

 * Added mysqli to some DB preps
 * Only allow some DB backend tasks, if mysql layers are supported.
 * Moved (mySQL only) Spartacus Note to title description, since using title also in frontend.
 * Some fixes here and there for PHP
 * Quick fixes to now look nice in 2.0 backend


* v.1.69
* ===========================
*
* S9y 2.0 serendipity_editor.js reference file fix
* Use serendipity_specialchars
*
*
* v.1.68
* ===========================
*
* Propagate $smarty.env.staticpage_pagetitle (and the others) so that it can be used in entries.tpl
*
*
* v.1.67
* ===========================
*
* Use native function parseTemplate() - extends to S9y >= 1.3
* Compatibility fixes
*
* 
* v. 1.66 2011-02-23 Spartacus
* ===========================
*
* 2011-02-23 CHANGED - tweaked some small font issues in eventcal CSS file
* 2011-02-23 ADDED   - double check db version upgrade and removed cleanup() being called every time
* 2011-02-22 BUGFIX  - wrong placed smarty_object_init() call outside class did disrupt blogs entry comments form (fixed)
*
*
* v. 1.65 2011-02-17 Spartacus
* ===========================
*
* 2011-02-17 latest: Smarty3 forward compatibility 
*
*
* v. 1.64 2011-02-15 Spartacus
* ===========================
*
* 2011-02-15 ADDED   - restriction of backend functionality and administration sidebar link to admin only
* 2011-02-05 CHANGED and ADDED
                     - lang constants. The lang files <en>, <de> and <de-utf8> are now up to date.
* 2011-02-05 CHANGED - smarty->fetch method call to be less strict to support smarty 2 to smarty3 parameter order change - removed param 4
* 2011-01-29 ADDED   - sort option order by timestamp desc to approved events (including minor correction in backend.css)
* 2011-01-29 ADDED   - management of eventcal database table, be able to dump, download and erase sql files
* 2011-01-28 CHANGED - backend checks if mysql table exists to be more strict in case of fresh installation.
* 
* 
* v. 1.63 2011-01-19 Spartacus
* ===========================
*
* 2011-01-09 ADDED   - smarty3 compat future use smarty3 code docs
* 2011-01-09 CHANGED - plugin_eventcal_cal.tpl removed start=1 from loop as of smarty3 compat
* 2011-01-08 BUGFIX  - eventcal db update didn't work as expected (fixed)
* 2010-07-22 CHANGED - internal url building to be more friendly to mod_rewrite setting via permalink or subpage (rewrite, none, errordocs defines the use of subpage).
* 2010-07-15 BUGFIX  - in case of form POST error, the calendar did not point to the referrers calendar month/year and fell back to January/year (fixed)
* 2010-07-15 CHANGED - style_event_backend.css, plugin_eventcal_add.tpl and plugin_eventcal_cal.tpl to be more strict to css rules
* 2010-07-15 CHANGED - some minor cleanups and corrected typos
* 
* 
* v. 1.62 2010-04-30 Spartacus
* ===========================
*
* 2010-04-28 BUG     - in case of changing unapproved events in backend, the form did not show the right type of event (bug closed)
* 2010-04-28 CHANGED - ics url behaviour via external_plugin to check if URL rewriting is supported
* 2010-03-22 CHANGED - external_plugin to be more strict to eventcals ics_export issues
* 
*
* v. 1.61 2010-03-11 Spartacus
* ===========================
*
* 2010-03-09 ADDED - missing mkdir eventcal directory in templates_c
*
* 
* v. 1.6 2010-02-24 Spartacus
* ===========================
* 
* IN DETAIL, the backend now has a sidebar link to get access to view, approve, insert and change events. The database administration panel has moved there also, 
*            but main admin stuff, like approve, change, erase, remains possible in frontend too. 
*            All over time, I ADDED new functions and CHANGED old functions, tpl files and en/de LANG files to support propper backend working
* 
* 2010-02-23 CHANGED - log file path to serendipity/templates_c/eventcal and ics file back to serendipity/uploads - see 2010-02-11
* 2010-02-20         - cleanup to release
* 2010-02-19 CHANGED - plugin_eventcal_ical.tpl to unparse the RRULE part of multi events, I am sure I did this somewhere before..., while multi events have an endday
* 2010-02-18 CHANGED - some vars to isset(vars) to avoid lots of PHP Notices in case of error_reporting(E_ALL)
* 2010-02-16 CHANGED - function send_ical_log_email, log to mail, to build entryURI as a href link with full parameters link access
* 2010-02-14 CHANGED - function sendIcalEmail - get rid of doubled Content-Type headers which produced a X-Amavis-Alert
* 2010-02-14 CHANGED - function send_ical_log_email to send error in case of write to file failed
* 2010-02-13 CHANGED - mail ical, to be more strict to entered email in plugins config or in S9y personal settings and LANG files
* 2010-02-11 CHANGED - function write_file icalendar.ics to use function backend_file_write and write file to new public folder underneath pluginpath 
*                      to send as file in case of mail or webcal. This changed the S9y/uploads path of version 1.5!
* 2010-02-10 ADDED   - stripslashes to prepare approved event to form, which is either relative to plattform (win) or php version ...(?)
*                      The old version without did not have this problem on my debian lenny server
* 2010-02-10 CHANGED - function str_replace_icalarray to function str_replace_recursive supporting NEW parameter 4 to search in specific array key only
* 2010-02-09 CHANGED - function send_ical_log_email to generate propper entryURI, logging iCal requests
* 2010-02-08 CHANGED - CW week view in plugin_eventcal_calweek.tpl to be same as in month calendar and CW's date view in css to be xx-small
* 2010-02-08 CHANGED - font css behaviour to be more strict to eventcal output only, get back control over blog templates settings
* 2010-02-07 CHANGED - log ical request behaviour. Now it is possible to log via email and/or file backend/ical.log
* 2010-02-07 ADDED   - in plugin_eventcal_ical.tpl the ORGANIZER part the RSVP=FALSE:MAILTO:"" directive, meaning "répondez, s'il vous plaît" set to NO
* 2010-02-06 CHANGED - hook_event 'external_plugin' and ical function to support all approved events admin download via email or download
* 2010-02-04 ADDED   - changed recurring error constant in LANG files to show supposed startday number
* 2010-02-04 BUG     - in function calculate_recur_validday - check recurring errors if startday does not correspond to selected weekday now matches 
*                      the secondlast and thirdlast weekday, which were not calculated properly and returned an error in case of add or re-edit validating (bug closed)
* 2010-02-04 ADDED   - strtolower(re) recur monthly event name constant in case of 'Each "re" Dayname'
* 2010-02-03 BUG     - in function draw_add - corrected the add form - rebuild year array in case of re-edit to show old startyear selected (bug closed)
* 2010-02-03 CHANGED - plugin_eventcal_entry.tpl & style_eventcal_backend.css - changed some css for better single entry view
* 2010-02-03 BUG     - in 'case css' - set correct stristr order to detect if the style.css already has plugins defined css (bug closed)
* 2010-02-03 CHANGED - style_eventcal_backend.css - be more strict to serendipityPrettyButton to avoid conflicts in backend working
* 2010-02-02 BUG     - in function view_app_events via load_unapproved_events now returns false if there is no value (bug closed)
* 2010-02-02 ADDED   - in plugin_eventcal_app.tpl - added missing biweekly constant
* 2010-02-01 NEW     - start adding backend administration via sidebar link to view approved, re-edit, approve and erase events including db cleanup stuff.
*                      this includes changes to en/de LANG files, some *.tpls and the stylesheet.
*
* v. 1.5 2010-02-01 Spartacus
* ===========================
* 
* IN DETAIL, I'll try to release this now ... its more a major one ;-)
* IN DETAIL, in config settings you can now set iCal export to allow as download, send as webcal, or as email, or via users own decision in frontend.
*            Although you can choose to allow iCal export explicit or not, if true, frontend image buttons will support single or monthly array iCal requests.
*            All over time, I added new and changed functions, config vars, tpls, lang constants and images to support and correct iCal export behaviour.
* 
* 2010-01-28 - CHANGED - improved sql SELECT-ARRAY statement again to be as strict as possible to all kind of tipo events
* 2010-01-26 - CHANGED - improved and added some lang constants and internal functions and tpls, added help to add form, re-edit startyear is now like stored in db
* 2010-01-24 - NEW     - added yearly single and recurring bi-weekly events to plugin class, tpls and en/de LANG files
* 2010-01-21 - BUG     - improved array 'case tipo 3 recurring monthly events' in monthview, which did not show up correctly in all cases (bug closed)
* 2010-01-17 - CHANGED - set validation of recurring monthly and weekly events to be more strict to startday is equal the day of first occurance of selected weekday,
*                        which is needed in iCal export. Please re-edit old events to get in touch with it!
* 2010-01-06 - NEW     - added to eventcal Database the TIMESTAMP fields tstamp as creation time value and modified as its last modified value, 
*                        this changed add form tpl too! This behaviour is needed in ical export.
* 2009-12-20 - CHANGED - improved and changed db SELECT events array to be more strict to multi and recurring events in function load_monthly_events() and ical export.
* 2009-12-20 - CHANGED - improved the monthly view array in function load_monthly_events(), which now should select and display all possible occurances.
* 2009-12-19 - CHANGED - improved and added some lang constants
* 2009-12-05 - CHANGED - some config settings - please submit them again
* 2009-12-02 - CHANGED - some minor tweeks to some *.tpl files and the css backend file
* 2009-12-01 - CHANGED - improved the internal 'get back to form' in case of errors
* 2009-11-26 - BUG     - improved weekly array 'case tipo 4 to every weekday' in monthview, which did not show up correctly in all cases (bug closed)
* 
* v.1.4 2009-11-21 Spartacus
* ==========================
* 
***************************************************************************************************