* riece-handle.el (riece-handle-join-message): Don't call

* riece-handle.el (riece-handle-join-message): Don't call
riece-switch-to-channel.
(riece-handle-part-message): Don't decode message if it is empty.
(riece-handle-kick-message): Ditto.
(riece-handle-quit-message): Ditto.
(riece-handle-kill-message): Ditto.

* riece-commands.el (riece-command-part): Show the current channel
as default candidate.

* riece-identity.el (riece-completing-read-identity): Accept
optional 5th argument `initial'.

* riece-unread.el (riece-unread-update-channel-list-buffer):
Simplified.

* riece-filter.el (riece-sentinel): Don't bind
riece-inhibit-update-buffers.

* riece-display.el (riece-redisplay-buffer): New variable.
(riece-inhibit-update-buffers): Abolish.
(riece-update-channel-list-buffer): Memorize
encoded identity as text property on each line.

* riece.el (riece-channel-list-mode): Make riece-redisplay-buffer
buffer local.
(riece-user-list-mode): Ditto.