new: [apache] add ``check-external-https`` indirect action

apache/actions/relations/publish-dir/check-external-https

@@ -0,0 +1,30 @@
+#!/bin/bash
+# compose: no-hooks
+
+## Load action gets a first argument a FILE/DIRECTORY/URL holding the necessary files.
+##
+##
+
+if [ -z "$SERVICE_DATASTORE" ]; then
+    echo "This script is meant to be run through 'compose' to work properly." >&2
+    exit 1
+fi
+
+usage="$exname [-h|--help]"
+
+while [ "$1" ]; do
+    case "$1" in
+        "--help"|"-h")
+            print_usage
+            exit 0
+        ;;
+        *)
+            err "Unexpected argument '$1'."
+            exit 1
+        ;;
+    esac
+    shift
+done
+url=$(relation-get url)
+
+curl -Isf "$url" --max-time 5 >/dev/null

apache/actions/relations/web-proxy/check-external-https

@@ -0,0 +1 @@
+../publish-dir/check-external-https