MDL-32639 files: Removing '0' start folder in archives created with filemanager

Signed-off-by: Vadim Dvorovenko <vadimon@mail.ru>

Conflicts:

	lib/filestorage/zip_archive.php
MDL-32639 files: Improved File Manager download and zip support

Conflicts:

	lib/filestorage/zip_packer.php
MDL-32639 files: Zipping a folder does not overwrite existing files
MDL-36456 repository: S3 handles errors in a nicer way
MDL-36958 Forum: Replaced hard-coded numbers with proper defines
MDL-37220 course dndupload - improved 'add files' icon
MDL-37186 add the ultimate TinyMCE custom parameter setting
MDL-36807 use our mysql socket logic in adodb tests
MDL-36212 rework html entity conversions

This should resolve all html entity conversion problems in different PHP versions.
MDL-28183 add num parts correct and clear wrong to multianswer
MDL-37191 do not timeout when uninstalling plugins
MDL-37254 add missing AS keyword
MDL-37152 remove bogus $mail->IsSMTP() breaking non-smtp mailing

Credit goes to Aurelijus Bruzas, thanks.
MDL-37281 fix other users current navigation node
MDL-37301 fix missing AS in select

This was breaking pg 8.3. Credit goes to Thomas Robb, thanks.
MDL-37128 fix E_STRICT rss restore issue
MDL-37105 prevent fatal error when category limit reached
MDL-36893 fix mnet E_STRICT issue
MDL-37315 fix connection reopening in ldap paging
Automatically generated installer lang files