Expose load_nat timeout parameter in load_interfaces() and P2PNode.start() #27
Description
I don't know why, but on my system (Windows 10 with a Ubuntu VM running via wsl) the call to nic = Interface(...); await nic.load_nat() in load_interfaces() only works in maybe 1 out of 6 tries. I tried in the terminal to call load_nat with a larger timeout, like 10 (default is 4), which consistently works. No matter what's the problem with my system, I think the timeout (and possibly the other load_nat parameters too) should be exposed in the load_interfaces() function (with the default value 4) and then, consecutively, in the P2PNode.start() method.