Replace "bucket" to formal "ban" messages.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5942 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Change Badpost to "revoked post", to avoid legal pettifoggers.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5943 63ad8ddf-47c3-0310-b6dd-a9e9d9715204