[Bug 53486] foobar2000.exe with foo_out_upnp breaks sending audio stream to another upnp renderer after a short period of time

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53486

--- Comment #15 from Pawel  ---
Created attachment 72906
  --> https://bugs.winehq.org/attachment.cgi?id=72906
DRAFT: Always prefer synchronous I/O in nonblocking mode

Wait! 
I have double-checked if there were any changes in server/sock.c file as
described in https://gitlab.winehq.org/wine/wine/-/merge_requests/617.
They were NOT applied.
So I grabbed the diff code (attached) and applied it.

And now - it works!