Feature request - allow "wildcard" in outbound-bind-interface (e.g. outbound-bind-interface wlan*) for server + maybe handle inferface up/downs nicer too?

The idea is that in case due to the way system works prohibits knowing full outbound interface name in advance and is liable to change on the fly a lot (e.g. wlan0, wlan1, etc), the system would bind to the first available that fits specified pattern e.g. if we launch with --outbound-bind-interface wlan* the software would bind to wlan0 OR wlan1 OR wlanpixenonsense24 whichever is available If multiple are available picks the first one in whatever simple name sort you choose to implement Also would be nice to have shadowsocks server to explicitly and more reliably shut down if the interface it was bound to goes down, I've had... Odd behaviors happen. " Edit: usecase is utilizing shadowsocks as efficient "swiss army knife" forwarding proxy in screwed up networking environments