Cherry-picks (latest-candidate) (canonical#536)

- Fix Dell Powerflex migrations from
canonical/lxd#13934
- Fix snap preseed support from
canonical#532
- Fix snapshot importing from
canonical/lxd#13899

snapcraft.yaml

@@ -1438,6 +1438,9 @@ parts:
       git cherry-pick -x 47180a352654bee9a994db714801813a59cfbb18 # lxd/apparmor/feature_check: add infastructure to check AppArmor features
       git cherry-pick -x b5a4a6540e793120b85a3b280003fce236e6a56f # lxd/apparmor/instance_lxc: allow nosymfollow mount flag
       git cherry-pick -x 86c3d515662068d825d23387623932bca96bc6aa # lxd/apparmor/instance_lxc: allow nosymfollow mount flag in more cases
+      git cherry-pick -x 69bd88119f5dc990452c79699915b3dd86dad242 # lxd/storage/backend/lxd: Pass full snapshot name when validating import in CreateInstanceFromBackup
+      git cherry-pick -x a35079f481c50adf7dfd571d2c815668f5f747a1 # lxd/instance/instance/utils: Don't allow snapshots named ".." in ValidName
+      git cherry-pick -x fcdc78dda31b210f246e075aaf4bf507b07b68f5 # lxd/instance: if storage location is remote, make cluster self healing available, and vm can migrate when src member is offline also
 
       # Setup build environment
       export GOPATH="$(realpath ./.go)"

snapcraft/commands/daemon.start

@@ -695,6 +695,12 @@ if [ "${daemon_verbose:-"false"}" = "true" ]; then
     CMD="${CMD} --verbose"
 fi
 
+# Check if this is the first time LXD is started.
+FIRSTRUN="false"
+if [ ! -d "${SNAP_COMMON}/lxd/database" ]; then
+    FIRSTRUN="true"
+fi
+
 # We deal with errors ourselves from this point on
 set +e
 
@@ -740,12 +746,11 @@ if [ "${RET}" -gt "0" ]; then
     exit 1
 fi
 
-## Check if this is the first time LXD is started
-if [ ! -d "${SNAP_COMMON}/lxd/database" ]; then
+## Process preseed if present
+if [ "${FIRSTRUN}" = "true" ]; then
     set -e
     echo "=> First LXD execution on this system"
 
-    ## Process preseed if present
     if [ -e "${SNAP_COMMON}/init.yaml" ]; then
         echo "==> Running LXD preseed file"
         ${LXD} init --preseed < "${SNAP_COMMON}/init.yaml"