merge in nyc-release history after reset to master

dbus/shill/dbus-constants.h

diff --git a/dbus/shill/dbus-constants.h b/dbus/shill/dbus-constants.h
index 00a1459..c1d6864 100644
--- a/dbus/shill/dbus-constants.h
+++ b/dbus/shill/dbus-constants.h
@@ -404,6 +404,7 @@
 const char kNameServersProperty[] = "NameServers";
 const char kDelegatedPrefixProperty[] = "DelegatedPrefix";
 const char kDelegatedPrefixLengthProperty[] = "DelegatedPrefixLength";
+const char kLeaseDurationSecondsProperty[] = "LeaseDurationSeconds";
 
 // IPConfig type options.
 const char kTypeIPv4[] = "ipv4";