GitLab

	* otr-plugin.h:
	* otr-plugin.c (otrg_plugin_proto_supports_otr): New function to
	check whether a given protocol supports OTR.  Right now,
	everything except IRC is assumed to support it.

	* otr-plugin.c (supply_extended_menu): Don't add the "OTR
	Settings" menu option to the per-buddy menu if this buddy's
	protocol doesn't support OTR.

	* ui.c (otrg_ui_find_policy): If the protocol doesn't support
	OTR, always return a policy of OTRL_POLICY_NEVER.