mDNS resolution not working with UDP srcport = 5353

[PaulFreund]

First thank you very much for this library. I discovered that I can not see any mDNS entries by default so I debugged a little bit with Wireshark and compared with another implementation.

Once I changed

Zeroconf/Zeroconf/NetworkInterface.cs

Line 109 in 0527d33

var localEp = new IPEndPoint(IPAddress.Any, 5353);

to 0 as port (which automatically chooses a free srcport) it worked. Is this something we can add to the library at least as an option?

[sanke]

Same here, after changing port to 0 discovery started to work consistently. Before it was working inconsistently and failing most of the time (returning empty set)