* riece-naming.el (riece-naming-assert-rename): Follow the

* riece-naming.el (riece-naming-assert-rename): Follow the
change of riece-channel.el.

* riece-message.el (riece-message-external-p): Follow the
change of riece-channel.el.

* riece-display.el (riece-update-user-list-buffer): Follow the
change of riece-channel.el.

* riece-commands.el (riece-command-kick): Follow the change of
riece-channel.el.
(riece-command-set-operators): Ditto.
(riece-command-set-speakers): Ditto.

* riece-button.el (riece-user-button-set-operators): Follow the
change of riece-channel.el.
(riece-user-button-set-speakers): Ditto.

* riece-channel.el (riece-make-channel): Abolish 2nd and 3rd
arguments.
(riece-get-channel): Follow the change of riece-make-channel.
(riece-channel-operators): Abolish.
(riece-channel-speakers): Abolish.
(riece-channel-set-operators): Abolish.
(riece-channel-set-speakers): Abolish.
(riece-channel-get-operators): Abolish.
(riece-channel-get-speakers): Abolish.
(riece-channel-toggle-user): Follow the change of the return type
of riece-channel-users.
(riece-channel-toggle-operator): Ditto.
(riece-channel-toggle-speaker): Ditto.
(riece-channel-operator-p): Abolish.
(riece-channel-speaker-p): Abolish.
(riece-channel-intern-user): Abolish.