Update leap-seconds to leap-seconds.3661459200.

NO leap second will be introduced at the end of June 2016.

This commit reapplies the r298887 minor spelling fix.

Obtained from:	ftp://tycho.usno.navy.mil/pub/ntp/.
See also:	http://www.iers.org/SharedDocs/News/EN/BulletinC.html
MFC after:	2 weeks

etc/ntp/leap-seconds

@@ -130,7 +130,7 @@
 #		Washington, DC
 #		jeffrey.prillaman@usno.navy.mil
 #
-#	Last Update of leap second values:  31 Dec 2015
+#	Last Update of leap second values:  11 Jan 2016
 #
 #	The following line shows this last update date in NTP timestamp 
 #	format. This is the date on which the most recent change to
@@ -138,7 +138,7 @@
 #	be identified by the unique pair of characters in the first two 
 #	columns as shown below.
 #
-#$	 3660508800
+#$	 3661459200
 #
 #	The data in this file will be updated periodically as new leap 
 #	seconds are announced. In addition to being entered on the line
@@ -170,10 +170,10 @@
 #	current -- the update time stamp, the data and the name of the file 
 #	will not change.
 #
-#	Updated through IERS Bulletin C 50
-#	File expires on:  1 Jun 2016
+#	Updated through IERS Bulletin C 51
+#	File expires on:  1 Dec 2016
 #
-#@	3673728000
+#@	3689539200
 #
 2272060800	10	# 1 Jan 1972
 2287785600	11	# 1 Jul 1972
@@ -217,5 +217,5 @@
 #	the hash line is also ignored in the
 #	computation.
 #
-#h	44a44c49 35b22601 a9c7054c 8c56cf57 9b6f6ed5
+#h	63b4df04 0907d94f 2dadb7a1 684f7767 2a372421
 #