XWIKI-9904: Fix the init of members in subwikis
XWIKI-9904: Fix a problem displaying members

* Convert list of 'members' HTTP parameters into a comma-list (for userPicker)
Fix typos
Merge remote-tracking branch 'upstream/master' into XWIKI-9904

Conflicts:
	xwiki-platform-core/xwiki-platform-wiki/xwiki-platform-wiki-ui/xwiki-platform-wiki-ui-mainwiki/src/main/resources/WikiManager/CreateWiki.xml
XWIKI-6709: Activity stream doesn't properly support the same document name in different wikis.
XWIKI-9914: Add ScriptService providing API to manipulate XAR files
* make a few internal classes public
XWIKI-9782: New Crypto Service API

Typo
XWIKI-9782: New Crypto Service API

- Properly reset digest as documented in comments
XWIKI-9909: Concurrent database migration cause SOLR indexer to fail in place of waiting
XWIKI-9579: Add a Distribution Step for showing a report of the changes brought to the wiki with full diffs
[misc] Fix jacoco instruction rate.
XWIKI-9871: Checking group membership in subwikis with User.isUserInGroup() doesn't work as expected

Fixing documentation for avoiding unexpected expectations :)
XWIKI-9347: Main Wiki's Activity Stream should collect data from all the wikis where I have view right.
XWIKI-9579: Add a Distribution Step for showing a report of the changes brought to the wiki with full diffs
* fix possible nullpointerexception
Merge pull request #255 from woshilapin/XWIKI-9904

XWIKI-9904: Fix the init of members in subwikis
[Misc] Fix invalid comments
XWIKI-9916: Adding an author and a creator to wiki descriptors and wiki settings documents.
XWIKI-9921: Make new wikis descriptor pages as children of WikiManager.WebHome

Commit done with Eduard MoraruÕs help
[cleanup] Bad merge conflict
XWIKI-9916: Adding an author and a creator to wiki descriptors when they are created.