* Remove call to method that was deprecated in 9.3 ( http://download.eclipse.org/jetty/9.3.13.v20161014/apidocs/deprecated-list.html ) and removed in 9.4. Looks like the setSelectorPriorityDelta method was simply dropped without being replaced by something else.

XCOMMONS-1230: Allow indicating recommended extensions versions in the environment extension and the configuration

* Refactor xwiki-platform-wysiwyg-server into xwiki-platform-wysiwyg-api

real time
* Add notifications.emails.live.graceTime configuration option
* Add LiveNotificationEmailManager
* Add LiveNotificationEmailListener

* Add the notifications.emails.enabled option.

* Added info to existing explanation about webdav

XWIKI-14281: Refactor Data mojo based on Extension Manager
XWIKI-14135: Introduce a generic XWiki flavor on platform side

XWIKI-14279: Upgrade to CSS4J 0.22 & JCLF 4.0.0
Also update jaxen to 1.1.6 since CSS4J draws 1.1.6
Also fix missing excludes for solr-api (I have no idea why this was missing, maybe there's something I don't understand...)

* Add a plural form to configuration option

* Fix typo

* Add flag in xwiki.properties

XWIKI-13868: Search xwiki.properties in /etc/xwiki/ first

XWIKI-11818: Change default value of xwiki.users.initialGroups based on xwiki.authentication.group.allgroupimplicit