core: add default keys alt+home/end and alt+F11/F12 for xterm
core: use one line titles and less chars for delimited blocks/tables in ChangeLog/NEWS
core: use one line titles in AUTHORS/INSTALL/README
doc: add link to download page for remote interfaces (user's guide)
irc: fix groups in channel nicklist when reconnecting to a server that supports more nick prefixes than the previously connected server