Should not try to reconnect if unix socket doesn't exist

[om26er]

If a new connection is established to the router using UDS and due to some reason the router is stopped, autobahn uses the same reconnect mechanism that it uses for TCP based transports.

IMO we could avoid doing the unneeded retry attempts if the UDS path doesn't exist. Having that feature would also mean that local clients can connect to the router instantly as soon as the UDS becomes available. (or at least on the next try if router workers take some time to fully start)

[om26er]

So basically instead of an attempt to reconnect, we should do a os.path.exists instead.

[oberstet]

yeah, I get it, makes sense to improve the behavior as you hint!