[PATCH v2] ws2_32: Very minimal support for AF_UNIX.

[Richard W.M. Jones]

Any comments on this one?

I previously posted a slightly different version:
https://www.winehq.org/pipermail/wine-devel/2020-August/172582.html

This version of the patch only changes the memcpy and memcmp calls so
that we don't assume UNIX_PATH_MAX is always 108 bytes (on MacOS it's
104 bytes).  I'm unable to test this on MacOS.

On Linux I have tested this pretty extensively using nbdkit,
our Network Block Device server, cross-compiled with mingw-w64
and running under Wine from git with this patch.
https://github.com/libguestfs/nbdkit

Rich.