[PATCH resend] ws2_32: Avoid depending on system getservby(name|port) functions

[Hans Leidekker]

On Thu, 2020-09-10 at 22:32 -0600, Alex Henrie wrote:
> These functions are incredibly slow on Windows. To avoid timeouts, I had
> to put the tests in protocol.c rather than the crowded sock.c.

Probably because Windows parses c:\windows\system32\drivers\etc\services. We
should use that file too because there are applications that append entries
to it and expect them to be resolved.