Added missing ticket numbers to RELNOTES entries. [ISC-Bugs #19660]

RELNOTES

@@ -61,34 +61,35 @@ work on other platforms. Please report any problems and suggested fixes to
 - 'dhclient' no longer waits a random interval after first starting up to
   begin in the INIT state.  This conforms to RFC 2131, but elects not to
   implement a 'SHOULD' direction in section 4.1. The goal of this change 
-  is to start up faster.
+  is to start up faster. [ISC-Bugs #19660]
   
 - Added 'initial-delay' parameter that specifies maximum amount of time 
   before client goes to the INIT state. The default value is 0. In previous 
   versions of the code client could wait up to 5 seconds. The old behavior 
   may be restored by using 'initial-delay 5;' in the client config file.
+  [ISC-Bugs #19660]
 
 - ICMP ping-check should now sit closer to precisely the number of seconds
   configured (or default 1), due to making use of the new microsecond
   scale timer internally to dhcpd.  This corrects a bug where the server
   may immediately timeout an ICMP ping-check if it was made late in the
-  current second.
+  current second. [ISC-Bugs #19660]
 
 - The DHCP client will schedule renewal and rebinding events in
   microseconds if the DHCP server provided a lease-time that would result
   in sub-1-second timers.  This corrects a bug where a 2-second or lower
   lease-time would cause the DHCP client to enter an infinite loop by
-  scheduling renewal at zero seconds.
+  scheduling renewal at zero seconds. [ISC-Bugs #19660]
 
 - Client lease records are recorded at most once every 15 seconds.  This
   keeps the client from filling the lease database disk quickly on very small
-  lease times.
+  lease times. [ISC-Bugs #19660]
 
 - To defend against RFC 2131 non-compliant DHCP servers which fail to
   advertise a lease-time (either mangled, or zero in value) the DHCP
   client now adds the server to the reject list ACL and returns to INIT
   state to hopefully find an RFC 2131 compliant server (or retry in INIT
-  forever).
+  forever). [ISC-Bugs #19660]
   
 			Changes since 4.2.0