[ntpsec commit] Add info about refclocks.

[Hal Murray]

Module:    ntpsec
Branch:    master
Commit:    6d415282e52ec4a79316dbb1e0030a99f6816d54
Changeset: http://git.ntpsec.org/ntpsec/commit/?id=6d415282e52ec4a79316dbb1e0030a99f6816d54

Author:    Hal Murray <hmurray at megapathdsl.net>
Date:      Fri Oct  2 22:00:46 2015 -0700

Add info about refclocks.

---

 INSTALL | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/INSTALL b/INSTALL
index efcdcae..5985614 100644
--- a/INSTALL
+++ b/INSTALL
@@ -108,6 +108,9 @@ The waf builder accepts `--enable-FEATURE' options to where FEATURE
 indicates an optional part of the package.  Do `waf --help' for a list
 of options.
 
+refclocks are enabled with `--refclock=<n1,n2,n3..>'
+`waf configure --list' will print a list of available refclocks.
+
 == Operation Controls ==
 
 The waf builder recognizes the following options to control how it