Import patches-unapplied version 2.474 to ubuntu/artful-proposed

Imported using git-ubuntu import.

Changelog parent: 11ad200f2e

New changelog entries:
  * Fix wrong variable name in systemd unit snippets.

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.474) artful; urgency=medium
+
+  * Fix wrong variable name in systemd unit snippets.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Wed, 11 Oct 2017 18:24:21 -0400
+
 livecd-rootfs (2.473) artful; urgency=medium
 
   [ Balint Reczey ]

live-build/ubuntu-server/includes.binary/overlay/etc/systemd/system/snap.subiquity.started.service.d/no-reexec.conf

@@ -1,2 +1,2 @@
 [Service]
-Environment=NO_REEXEC=0
+Environment=SNAP_REEXEC=0

live-build/ubuntu-server/includes.binary/overlay/etc/systemd/system/snapd.service.d/no-reexec.conf

@@ -1,2 +1,2 @@
 [Service]
-Environment=NO_REEXEC=0
+Environment=SNAP_REEXEC=0