Fix a MediaWiki error spotted by Andreas “gecko2” Gockel:

Call to a member function getFullUrl() on a non-object in \
/usr/share/mediawiki/includes/SpecialPageFactory.php on line 458
add helper scripts to dump/restore pages+images+files of a wiki
Fixed mailing-list updating script (missing variable assignment)
Fix number of projects shown (site admin; feature_boxes)
Also fix number of pending projects on MyAdmin widget
the second argument to mkdir is *not* the file permbits afterwards

instead, it’s the default value to use, before umask processing
Merge branch 'Branch_5_1' into Branch_5_2

Conflicts:
	src/www/admin/index.php