SASL: Using locally mapped s_gmatch instead of unavailable gmatch.

Merge with trunk

MUC: Only allow moderators to change the room subject.

MUC: Prevent visitors from broadcasting messages.

MUC: Improved handling of incoming groupchat messages (state preserved for possible later use).

Removed some legacy doc/ files.

Merge with Tobias's SASL redesign branch

Merge with trunk.

Reduce needed roundtrips during DIGEST-MD5 login.

Adding some human readable error messages.

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mercurial