Fix remote address format to work with Windows Firewall rules.

[iceweasel-oai]

since March 27, most elevated sandbox setups are failing with:

{
  "code": "helper_firewall_rule_create_or_add_failed",
  "message": "SetRemoteAddresses_failed__Error___code__HRESULT_0xD000000D___message___An_invalid_parameter_was_passed_to_a_service_or_function.",
  "originator": "Codex_Desktop",
  "__metric_type": "sum"
}