Chrony with real-time scheduler uploaded to Experimental

[John Hasler <jhasler@debian.org>]

I have uploaded a version of Chrony (chrony_1.23-6rt) with support for the
SCHED_FIFO real-time scheduler to Experimental.  Running Chronyd with this
feature enabled should result in decreased (and more consistent) latency.
Please test, especially if you have the means to measure latency variation.
The feature is documented in the Chronyd man page and in the comments in
chrony.conf (but not in the info docs).

I intend to add mlockall() support next.
-- 
John Hasler