remove keyring workaround
these changes: http://trac.gajim.org/changeset/7321 may be reverted IMHO - bug http://bugzilla.gnome.org/show_bug.cgi?id=363019 has been fixed long time ago. Unfortunately, gnomekeyring.get_default_keyring_sync() returns always None in current gnomekeyring python bindings, but this has been already reported and is fixed in 2.22 and trunk branches. http://bugzilla.gnome.org/show_bug.cgi?id=531254. Patch attached.