Add -help [options|tests|all] and remove tests from default usage message

Previously, the error message when giving a bad option was over 350 lines
long.  This moves the list of tests out into the `-help tests` option and
makes the usage error message a much more reasonable 32 lines long.

(Also accepts but does not document --help.)

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/test/x11perf/-/merge_requests/10>

0 files changed, 0 insertions, 0 deletions