Updating existing DNS zone with SRV is not being saved correctly

[darylholling]

When updating existing DNS zone with SRV records the zone is not being saved correctly, SRV data is not saved while the other records are.

Example sent by e-mail from Harm didn't work either, See PR #4 for created example and update to the api_library.

{
"hostname": "domain.tld",
"account": "your@account.com",
"records": [
{
"type": "SRV",
"service": "%service%",
"domain": "%domain% or @",
"protocol": "%protocol%",
"priority": "%priority%",
"weight": "%weight%",
"port": "%port%",
"target": "%target%",
}
]
}