Support for Changing the Bind Address

[geoffreywiseman]

At the very least, it should be possible to set the bind address for a particular execution of TBM, if not within the tunnel configuration (as a default or on a per-tunnel basis).

In particular, I do sometimes want to access a tunnel on my development machine from within the guest operating system running in virtualization on that host machine, and the default bind address of 127.0.0.1 doesn't allow that.

Net::SSH seems to support changing the bind address, but TBM doesn't expose that.