* riece-naming.el (riece-naming-assert-join): Call

* riece-naming.el (riece-naming-assert-join): Call
riece-update-buffers.
(riece-naming-assert-part): Ditto.

* riece-filter.el (riece-sentinel): Don't bind
riece-overriding-server-name; use riece-part-channel.

* riece-display.el (riece-switch-to-channel): Don't set
riece-channel-buffer.
(riece-update-buffers): Set riece-channel-buffer here.

* riece-commands.el (riece-command-switch-to-channel-by-number): Fixed.
(riece-command-close-server): Fixed completion bug.
(riece-command-universal-server-name-argument): Ditto.