For privacy concern, remove birthday (has been deprecated for a while)
and fix password input length.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5858 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Update info for r5858.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5859 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Revise over18 messages


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5860 63ad8ddf-47c3-0310-b6dd-a9e9d9715204