Handle URL record type

[mxmehl]

Fixes #20

Unfortunately, the API seems to be buggy. Changing attributes like urlAppend leads to errors:

[2024-03-15 17:49:19] INFO: [example.com] Update 'URL' record of 'example.com': 'urlAppend' from 'True' to 'False'
[2024-03-15 17:49:19] DEBUG: Resetting dropped connection: api.domrobot.com
[2024-03-15 17:49:19] DEBUG: https://api.domrobot.com:443 "POST /jsonrpc/ HTTP/1.1" 200 None
Request (nameserver.updateRecord): {"method": "nameserver.updateRecord", "params": {"id": 587719457, "urlAppend": 0}}
Response (nameserver.updateRecord): {"code":2306,"msg":"Parameter value policy error","reasonCode":"Error_NothingToUpdate","reason":"There is nothing to update."}
[2024-03-15 17:49:19] ERROR: API call error for 'nameserver.updateRecord' with params '{'id': 587719457, 'urlAppend': 0}': {'code': 2306, 'msg': 'Parameter value policy error', 'reasonCode': 'Error_NothingToUpdate', 'reason': 'There is nothing to update.'}

Changing the urlRedirectType on the other side has no effect. This message appears all the time:

[2024-03-15 17:50:56] INFO: [example.com] Update 'URL' record of 'www.example.com': 'prio' from '301' to '302'
[2024-03-15 17:50:56] INFO: [example.com] Update 'URL' record of 'www.example.com': 'urlRedirectType' from 'HEADER301' to 'HEADER302'
[2024-03-15 17:50:56] DEBUG: [www.example.com] (587719458) urlRedirectTitle equal:  =
[2024-03-15 17:50:56] DEBUG: [www.example.com] (587719458) urlRedirectDescription equal:  =
[2024-03-15 17:50:56] DEBUG: [www.example.com] (587719458) urlRedirectFavIcon equal:  =
[2024-03-15 17:50:56] DEBUG: [www.example.com] (587719458) urlRedirectKeywords equal:  =
[2024-03-15 17:50:56] DEBUG: [www.example.com] (587719458) urlAppend equal: True = True
[2024-03-15 17:50:56] DEBUG: Resetting dropped connection: api.domrobot.com
[2024-03-15 17:50:56] DEBUG: https://api.domrobot.com:443 "POST /jsonrpc/ HTTP/1.1" 200 None
Request (nameserver.updateRecord): {"method": "nameserver.updateRecord", "params": {"id": 587719458, "prio": 302, "urlRedirectType": "HEADER302"}}
Response (nameserver.updateRecord): {"code":1000,"msg":"Command completed successfully"}