fix: [nextcloud] detect correctly previously declared trusted domain

This will prevent also to have a new trusted domain being added at each
relation-joined time.

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

nextcloud/hooks/web_proxy-relation-joined

@@ -18,7 +18,7 @@ occ_opts=(
     config:system:set overwritehost --value="$DOMAIN" \;
     config:system:set overwriteprotocol --value="$PROTO"
 )
-if ! [[ "$'\n'$trusted_domains$'\n'" == *"$'\n'$MASTER_BASE_SERVICE_NAME$'\n'"* ]]; then
+if ! [[ $'\n'"$trusted_domains"$'\n' == *$'\n'"$MASTER_BASE_SERVICE_NAME"$'\n'* ]]; then
     trusted_index=$(echo "$trusted_domains" | wc -l)
     debug "Adding $MASTER_TARGET_SERVICE_NAME to ${WHITE}trusted_domains${NORMAL}."
     occ_opts+=( \; config:system:set trusted_domains "$trusted_index" --value="$MASTER_BASE_SERVICE_NAME")