pidgin/pidgin

IRC: Skip EXTERNAL SASL auth mechanism
release-2.x.y
2016-09-22, Kernc
e11ea6f07c5b
IRC: Skip EXTERNAL SASL auth mechanism

Makes Freenode and other servers that prefer SASL EXTERNAL
fingerprint authentication work again.

Ref:
"Cannot connect to IRC (Freenode)"
https://pidgin.im/pipermail/support/2016-September/029627.html
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