README.md: replace sagehill.net link with archive.org version
Domain has apparently expired and been acquired by someone different (as reported in xorg/lib/libx11#224 (comment 2640950))
Signed-off-by: Alan Coopersmith
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Domain has apparently expired and been acquired by someone different (as reported in xorg/lib/libx11#224 (comment 2640950))
Signed-off-by: Alan Coopersmith