Tim Hunt 7529f9e944 MDL-29548 allow message plugins to control message
defaults.

At the moment, each message_provider can specify defaults for
each message output, to say whether that message output should be
used for this type of message:
http://docs.moodle.org/dev/Messaging_2.0#Adding_new_message_type.

If the message provider does not set a default, this change allows
the message output to set the default.
2011-10-04 11:23:52 +01:00
..