- otr: strip the OTR whitespace tag by shifting the full remaining tail
(including the trailing NUL) instead of tag_length bytes, which duplicated
the body for messages longer than the tag (#8).
- xmpp: snapshot resource name/status/priority/presence before
connection_add_available_resource() transfers ownership of the Resource, so
the later reads can no longer become a use-after-free (#9).
- omemo: propagate _omemo_finalize_identity_load failure on connect — mark the
context unloaded, log it, surface a cons_show_error, and stop instead of
silently leaving OMEMO unavailable (#10).
Refs #112