change build prefix
remove backuppc; I don't use it
fix ioq3ded prefix
rm ncurses (use upstream build)
-I$PREFIX in default CPPFLAGS
link mutt against /usr/gnu ncurses
fix nethack paths
fix libtorrent build
fix pkg-config mirror
use RUN_DEPENDS_IPS in ioq3ded
fix postfix paths
procmail path fix
build procmail quietly
fix rtorrent build
fix tin build, change paths
set PATH for procmail

apparently you have to do this compile-time
add /usr to pkg-config default paths
fix irssi linking
drop rtorrent PKG_CONFIG_PATH; should be default now
gdb ncurses rpaths