Concatenate string in SQL instead of PHP, use doctrine to construct concat expression
Fixed "select all" + download on public page

When a user has lots of files, selecting all and downloading would send
the whole list of files to the server.

This fix makes it use the simpler default download URL in such cases
(the one that was used by the "Download" button that is now removed on
the public page)
we first shall check if the current session is valid - otherwise the session-id will be regenerated on login via basic auth
fixing ident
Merge pull request #7633 from owncloud/fix-7582-stable6

Fix 7582 stable6
we need the file_source to delete a share successfully
Merge pull request #7653 from owncloud/backport-7646-stable6

we need the file_source to delete a share successfully
Disable XML entities when parsing XML
Merge pull request #7608 from owncloud/stable6-publicpagedownloadall

[stable6] Fixed "select all" + download on public page
Reset time of last update feed polling
   backport #7659
remove magic handling of recipient lists by exploding the string - this functionality is nowhere used this way and nowhere documented - and broken because only $toaddress will be exploded not $toname
Merge pull request #7672 from owncloud/backport-7659-stable6-2

Backport 7659 stable6 2
fix path creation for re-shares, issue #7662
add 'received_from' info to the share, so that every share can have a different value
increase version number
set content-type on ocs exceptions
fixing method names
only enable drag&drop upload if public upload is allowed, backport of #7631
Merge pull request #7280 from owncloud/tune_legacy_cache_webdav_properties_prefixing_stable6

Concatenate string in SQL instead of PHP, use doctrine to construct concat expression