Object-form DNS server entries always received port: 53, because
DnsServerObjectInnerSchema defaulted the port unconditionally and the
DnsServerModal wire adapter always wrote it. Per Xray-core, encrypted
schemes must not carry a port field; a non-standard port is embedded in
the URL instead.
Default the port to 53 only for non-encrypted addresses and omit it for
the encrypted DNS schemes Xray dispatches without a port - https,
https+local, h2c, h2c+local and quic+local - both in the Zod schema and
in the modal's valuesToWire adapter. Schemes are matched
case-insensitively to mirror Xray-core's EqualFold comparison. A shared
isEncryptedDnsAddress helper backs both paths.
Fixes#5920
Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
