Merge branch 'quieter-live-server-boot' into ubuntu/master

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.714) UNRELEASED; urgency=medium
+
+  * Suppress cloud-init output during boot of live server ISO.
+
+ -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Thu, 25 Feb 2021 15:26:01 +1300
+
 livecd-rootfs (2.713) hirsute; urgency=medium
 
   * Use the full name of the 'boot' flag in parted calls as it's not good

live-build/ubuntu-server/includes.binary/overlay/etc/cloud/cloud.cfg.d/06_quiet.cfg

@@ -0,0 +1,4 @@
+output: {all: '>> /var/log/cloud-init-output.log'}
+no_keys_to_console: true
+ssh:
+  emit_keys_to_console: false