HTTP server not accepting incoming connections from localhost

[sanity]

The HTTP server is being started with 0.0.0.0:50509 as shown in the logs:

INFO freenet::server: HTTP gateway listening on 0.0.0.0:50509

When the server checks if the connection is local, it's using the binding address (0.0.0.0) rather than the incoming connection address to determine if it's a loopback connection. Since 0.0.0.0 is not a loopback
address, the check fails.

The workaround is to call freenet with the parameter --ws-api-address 127.0.0.1.

The proper fix is to modify the code to check the incoming connection address rather than the binding address.

[iduartgomez]

I feelw e broke this at some point, ti should be pointing to localhost. Should be an easy fix.