Revise cross-post warning messages.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5853 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Don't add new boards by default.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5854 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Change default my fav to be one entry in editable.


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5855 63ad8ddf-47c3-0310-b6dd-a9e9d9715204