tweaks with help from jmc@

src/usr.sbin/ntpd/ntpd.8

@@ -1,4 +1,4 @@
-.\" $OpenBSD: ntpd.8,v 1.42 2019/06/20 08:26:13 otto Exp $
+.\" $OpenBSD: ntpd.8,v 1.43 2019/06/20 12:20:20 otto Exp $
 .\"
 .\" Copyright (c) 2003, 2004, 2006 Henning Brauer <henning@openbsd.org>
 .\"
@@ -64,12 +64,11 @@ Cancel the effect of the
 .Fl s
 flag.
 .It Fl s
-Try to set the time immediately at startup, as opposed to slowly adjusting the
-clock.
+Always try to set the time at startup.
 By default
 .Nm
-attempts to set the time at boot if constraints are configured and
-satisfied and the clock should be moved forward.
+attempts to set the time at boot only if constraints are configured and
+satisfied, and the clock should be moved forward.
 .Pp
 .Nm
 will stay in the foreground for up to 15 seconds waiting for one of the