Log Message:
Update kronolith to 2.3.6.
(while here, set LICENSE=gnu-gpl-v2, fix unwanted empty directories creation)

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v2.3.6
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[jan] Add upgrade scripts for next-generation SQL share driver.
[jan] Export recurrence exceptions in a more portable way.

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v2.3.5
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[gwr] Fix moving events between calendars for the Kolab driver (Bug #7932)
[jan] Import and export the privacy field in CSV data (Request #9139).
[mjr] Send an iTip REQUEST, not ADD, when updating an existing event
      (Bug #9131).
[jan] Fix all-day events sometimes showing up an day early too (Bug #9012).
[mjr] Sort exception list before displaying (Request #7688).
[mjr] Do not remove history entries when removing user data (Bug #8755).

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v2.3.4
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[jan] Delete Horde alarms when resetting an event alarm.
[jan] Set an alarm to one minute, if users try to set an alarm without time.
[gwr] Fix editing the start date of recurring events (kolab/issue3885).

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v2.3.3
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[jan] Fix editing URLs of remote calendars.
[gwr] Fix recurring weekly events with fixed number of occurences but multiple
      incidences per week (kolab/issue3846).
[gwr] Fix recurring weekly events with intervals > 1 (Bug #8546).
[jan] Optimize event link generation (patrick.abiven@apitech.fr).
[jan] Fix Oracle SQL scripts.
[jan] Fix charset of ajax responses.
[jan] Add Croatian translation (Matej Vela <matej.vela@carnet.hr>).
[jan] Speed up listing alarms (patrick.abiven@apitech.fr, Request #8638).
[jan] Simplify and improve portability of listing events without date limits
      in the SQL driver (Bug #8590).
[mjr] Fix issue that caused the default alarm time to be applied to
      listTimeObjects events (Bug #8588).

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v2.3.2
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[mms] Upgrade prototype.js to v1.6.1.
[jan] Allow to add address lists as attendees through the address book popup
      (Bug #7834).
[jan] Fix exporting certain weekday recurrence rules to iCalendar
      (lst_hoe02@kwsoft.de, Bug #8501).
[jan] Export recurrence end dates as date-time values in iCalendar data to
      improve compatibility with external clients (Bug #7846).
[jan] Fix synchronization with output compression enabled (Bug #7769).
[jan] Add configuration whether to show user drop down list or text field in
      permissions dialog (requires Horde 3.3.5).
[jan] Propagate the 'modified' API method (Request #8274).
[cjh] Fix the signature of the kronolith/import API method
      (rpolli@babel.it, Bug #8309).
[jan] Correctly create all-day events if using the all-day link in the day
      view (stpierre@nebrwesleyan.edu, Bug #8220).
[jan] Fix rendering of all-day events (Bug #8176).

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v2.3.1
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[jan] Render contact autocompletion list on top of free/busy blocks (Bug #7273).
[jan] Save recurrence exceptions when copying events (Bug #7689).
[jan] Prevent warnings if trying to add address lists as attendees (Bug #7834).
[jan] Fix start and end time calculation of multi-day events (Bug #7788).
[jan] Wrap URL in calendar information in IE7 (almarin@um.es, Bug #8043).
[jan] Fix "Date-string has wrong format" error with holidays (Bug #7961).
[jan] Use improved translation support in Date_Holidays (requires 0.21.0 now,
      Bug #7272).
[jan] Empty view cache when changing calendar selection
      (stpierre@nebrwesleyan.edu, Bug #7879).
[mjr] Fix category CSS being included on embedded widgets.
[cjh] Work around BC break with Horde versions before 3.2 (Bug #7820).
[jan] Allow to manually change attendee responses (paul@carnie.com.au,
      Request #7443).
[jan] Fix linking to last week across certain year boundaries (Bug #7827).
[jan] Add script to import events from SquirrelMail database.
[cjh] Add private-***.png graphics to Tango and Silver themes (Bug #7531).
[cjh] Fix listing of users in the calendar/browse API call.
[jan] Set timezone per user preference and fix recurring events when sending
      reminders through Kronolith (develop@kristov.de, Bug #7038).
[cjh] Add a PostgreSQL-specific upgrade script for 2.2 to 2.3
      (michael.menge@zdv.uni-tuebingen.de, Bug #7454).
[mms] Upgrade prototype.js to v1.6.0.3.