* lisp/net/rcirc.el (rcirc-show-maximum-output): New var.
(rcirc-buffer-process): If no buffer argument is supplied, use
current-buffer.
(rcirc-complete-nick): Complete to the last completed nick first.
(rcirc-mode): Preserve the value of `rcirc-urls' across
connections. Setup scroll function.
(rcirc-scroll-to-bottom): New function.
(rcirc-print): Use nick syntax around regexp work. Notice
dim-nicks speaking only if they say our nick.
(rcirc-update-activity-string): Do not show the modeline indicator
if there are no live rcirc processes.
(rcirc-cmd-ignore): Ignore case.
(rcirc-browse-url-at-point): Fix off-by-one error.