(Bug 3117) "0" now works as a keyword if set for an existing userpic,
but doesn't yet work for a new userpic.
Bug 3117 - 0 can also be set as a keyword on icon upload.
(Bug 3117) Now works for multiple keywords.  Also changed the use of map to be
more perlish.
(Bug 3117) Fixing a regular expression.
Merge pull request #345 from annariel/Bug3117

Bug3117