add restic env, firewall

firewall/map.jinja

@@ -0,0 +1,14 @@
+{% set firewall = salt.grains.filter_by({
+    'Debian': {
+      'pkg': 'iptables-persistent',
+      'cfg': '/etc/iptables/rules.v4',
+      'svc': 'netfilter-persistent',
+      'remove': None,
+    },
+    'RedHat': {
+      'pkg': 'iptables-services',
+      'cfg': '/etc/sysconfig/iptables',
+      'svc': 'iptables',
+      'remove': 'firewalld',
+    }
+}) %}