XMPP /join command requires room to start with # since 2.7.11

[bcx]

In 2.7.10 and before I was able to type:

/join mynewroom

Then pidgin showed me the 'Create New Room' dialog and created the room.

Since 2.7.11 this will only work if I prepend the room name with a hash symbol (#)

/join #mynewroom

Does work, but creates the new room with the hash symbol.

Also, adding the server the room is to be created on:

/join mynewroom @ conference.myxmppdomain.net

works. (spaces inserted above to avoid the trac email address detector to kick in)

[darkrain42@…]

(In [88a31134afaea05acb0a895396443631d4ffe4a8]):
jabber: Fix /join behavior. Closes #14205.

Also marked a string for translation. "/join foo" fails because 'foo' passes nameprep.