pidgin/pidgin

irc: handle AUTHENTICATE as a normal command with server prefix
release-2.x.y
2018-03-05, dx
86e7c9ca0bcd
irc: handle AUTHENTICATE as a normal command with server prefix

The previous code expected it to be at the beginning of the line with no
:prefix. Probably because the sasl-3.1 spec gave examples that way.
This adds it as a normal command handler as it should have been since the
beginning. Fixes login to oragono servers.

Don't know if the signature of irc_msg_auth() is API so did it the safe way.
For information on writing a plugin for Purple, Pidgin or Finch, go
http://developer.pidgin.im and click on API. From there, see the
HOWTOs in the "Related Pages" section.
You can also generate this documentation locally by installing
doxygen and graphviz dot, then running "make docs" in the
source tree. The documentation will be in the docs/html directory.