fix ntpd.8 rfc authors

[Arto Jonsson]

University of Delaware mixup.

Index: ntpd.8
===================================================================
RCS file: /cvs/src/usr.sbin/ntpd/ntpd.8,v
retrieving revision 1.36
diff -u -p -r1.36 ntpd.8
--- ntpd.8      4 Oct 2013 14:28:16 -0000       1.36
+++ ntpd.8      12 Feb 2014 14:37:13 -0000
@@ -153,7 +153,6 @@ Socket file for communication with
 .Pp
 .Rs
 .%A D. Mills
-.%A U. Delaware
 .%A J. Martin
 .%A J. Burbank
 .%A W. Kasch