pr fixes. refactor of network code. moved network-start methods into static methods, as they can only be called during certain stages or do not need Host class. Mutex start/stop. Added m_ifAddresses and removed m_addresses. Rewrite determinePublic. IP address preference is now: user-supplied public > user-supplied private (if localnetwork enabled) > first public4 interface > upnp4 > first private4 interface (if localnetwork enabled) > unspecified. IPv6 addresses are currently ignored (unless manually entered by user) until link-local addresses can be properly detected.