NEW PROVIDER: AutoDNS (#1336)

* Implement AutoDNS provider to manage existing zones

* Moved AuditRecords() in to separate file to ease automatic updating

* S1011 - Use a single append to concatenate two slices

* Set list of available record types as returned by the system

* Fixed style, clarify code and add some extra comments

* Documented simple configuration and usage example of AutoDNS

* Convert MX and SRV record properly from string to actual structs and back

* Add support for integration tests of AutoDNS

* Return error message from update request instead of invoking panic()

* Skip AUTODNS in test for RFC 7505 (null MX)

* Update providers/autodns/autoDnsProvider.go

Co-authored-by: Tom Limoncelli <tlimoncelli@stackoverflow.com>

integrationTest/integration_test.go

@@ -757,6 +757,7 @@ func makeTests(t *testing.T) []*TestGroup {
 		testgroup("Null MX",
 			// These providers don't support RFC 7505
 			not(
+				"AUTODNS",
 				"AZURE_DNS",
 				"DIGITALOCEAN",
 				"DNSIMPLE",

integrationTest/providers.json

@@ -3,6 +3,12 @@
     "ADServer": "$AD_SERVER",
     "domain": "$AD_DOMAIN"
   },
+  "AUTODNS": {
+    "username": "$AUTODNS_USERNAME",
+    "password": "$AUTODNS_PASSWORD",
+    "context": "$AUTODNS_CONTEXT",
+    "domain": "$AUTODNS_DOMAIN"
+  },
   "AXFRDDNS": {
     "domain": "$AXFRDDNS_DOMAIN",
     "master": "$AXFRDDNS_MASTER",