Import patches-unapplied version 2.492 to ubuntu/bionic-proposed

Imported using git-ubuntu import.

Changelog parent: f6d60551d8

New changelog entries:
  * Oops. I shouldn't reference my private stuff.

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.492) bionic; urgency=medium
+
+  * Oops. I shouldn't reference my private stuff.
+
+ -- Iain Lane <iain.lane@canonical.com>  Tue, 30 Jan 2018 11:51:19 +0000
+
 livecd-rootfs (2.491) bionic; urgency=medium
 
   * Support seeding of snaps, as emitted by germinate >= 2.27.

live-build/auto/config

@@ -5,8 +5,7 @@ rm -rf config
 
 echo "Building on $(hostname --fqdn)"
 
-SEEDMIRROR=http://people.canonical.com/~ubuntu-archive/~laney/seeds/
-MIRROR=http://raleigh/mirrors/ubuntu/
+SEEDMIRROR=http://people.canonical.com/~ubuntu-archive/seeds/
 if [ -z "$MIRROR" ]; then
 	case $(hostname --fqdn) in
 		bld-*.mmjgroup.com)	;;