Keep input line at bottom of screen in rcirc

[Björn Lindström]

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and the precise symptoms of the bug:

There should be an option available for keeping the input line to the
bottom of the screen.

It would work rougly like this: if a message comes into a buffer, point
is in the input, and the whole buffer doesn't fit in the window, change
the view so that the last line of input is at the bottom of the screen.

In GNU Emacs 22.0.50.1 (i486-pc-linux-gnu)
 of 2005-12-21 on pacem, modified by Debian
configured using `configure '--build' 'i486-linux-gnu' '--host' 
'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' 
'--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' 
'--mandir=/usr/share/man' '--with-pop=yes' 
'--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/22.0.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/22.0.50/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/22.0.50/leim'
 '--with-x=no' 'CFLAGS=-DDEBIAN -g -Wno-pointer-sign -O2' 
'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu''

Major mode: rcirc