Convert all my license statements to the standard, accepted form: cf. <20070717142307.GD13478@fooishbar.org> http://lists.freedesktop.org/archives/xorg/2007-July/026451.html keithp's license on configure.ac changed with his verbal permission.
Add no-op bell ringing support, and remove obsolete @SERVER_DEFINES@ and @LOADER_DEFINES@ from CFLAGS.