Hi,
I'm trying to bind web server to both station and AP network.
When I run Station and IP without setting an IP and station receive the same IP as AP then web server works on both.

However when I set different IP for station then only AP is accessible. My sample code is here:
https://github.com/Matzz/Sming/blob/StationAndApHttpServer/samples/StationAndApHttpServer/app/application.cpp

I was thinking about a PR to enable correct behavior. My one idea was to replace IP_ADDR_ANY with provided IP in following line:

	err_t res = tcp_bind(tcp, IP_ADDR_ANY, port);

However, it will require running 2 web servers at the same time, which is inefficient.
Another idea is to modify this line to bind to both networks regardless the IP. I saw this working when IP is the same for both Station and IP. However, due to lack of lwIP knowledge, I don't know how to enforce that for different ip.

I'm willing to make a PR for that but I would need some guidance / ideas first.

Regards,
Matzz