INWX: support ALIAS records

[tennox]

see #2856 (comment)

I have tested to confirm it works.

[tennox]

One weird thing though - it will update the ALIAS record on every push:

#2: ± MODIFY ALIAS tam.ma: (ipfs.target.com.domain.org. ttl=600) -> (ipfs.target.com. ttl=600)

Which I'm guessing is an error in the read value?

[eliheady]

Hi @tennox

One weird thing though - it will update the ALIAS record on every push:

It is because the INWX API removes the trailing dot in API responses. You have to tell the provider to add it back before calculating zone corrections. This may be all that is needed to resolve the bad change detection:

@@ -311,6 +311,7 @@ func (api *inwxAPI) GetZoneRecords(domain string, meta map[string]string) (model
                        "NS":    true,
                        "SRV":   true,
                        "PTR":   true,
+                       "ALIAS": true,
                }
                if rtypeAddDot[record.Type] {
                        if record.Type == "MX" && record.Content == "." {

This will add the trailing dot to ALIAS records after pulling the zone data.

[eliheady]

This commit by @egon0 implements changes that get ALIAS working for INWX without the unnecessary repeated change on push.

@tennox are you interested in pulling those additional changes into your PR?