[dhcp] comment xen-checksum.patch in spec

[Jiří Popelka]

commit d91361821c0707a0d512e533163e371201d046e9
Author: Jiri Popelka <jpopelka at redhat.com>
Date:   Wed Apr 3 13:08:42 2013 +0200

    comment xen-checksum.patch in spec

 dhcp.spec |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/dhcp.spec b/dhcp.spec
index 1df5970..b6605da 100644
--- a/dhcp.spec
+++ b/dhcp.spec
@@ -211,7 +211,10 @@ rm -rf includes/isc-dhcp
 # to the list of default requested DHCP options
 %patch7 -p1 -b .requested
 
-# Handle Xen partial UDP checksums
+# Handle partial UDP checksums (#221964)
+# (Submitted to dhcp-bugs at isc.org - [ISC-Bugs #22806] - by Michael S. Tsirkin)
+# http://comments.gmane.org/gmane.comp.emulators.kvm.devel/65236
+# https://lists.isc.org/pipermail/dhcp-hackers/2010-April/001835.html
 %patch8 -p1 -b .xen
 
 # Various man-page-only fixes