autogen.sh: Pass --force to autoreconf

Ensure we get all files installed when running autoreconf by passing
--force to overwrite previously-generated ones, which fixes running it
from tarballs.

Also revert Peter's local changes to pass arguments to configure, all of
which are the default now anyway, AIUI.

autogen.sh

@@ -6,7 +6,7 @@ test -z "$srcdir" && srcdir=.
 ORIGDIR=`pwd`
 cd $srcdir
 
-autoreconf -v --install || exit 1
+autoreconf --force -v --install || exit 1
 cd $ORIGDIR || exit $?
 
-$srcdir/configure --enable-maintainer-mode --disable-dmx --enable-dri --enable-kdrive "$@"
+$srcdir/configure --enable-maintainer-mode "$@"