net: run.sh: support tmux as terminal

Create one tmux session, with each Osmocom program in one window, if
tmux is chosen as "terminal". This allows using osmo-dev's run.sh over
ssh without X forwarding. Also the existing supported terminals
automatically scroll to the bottom as soon as there is new output,
making it hard to read logs.

Change-Id: Iaef08fb3cb3c6f58cd8490a631e177a03af9c974
2 files changed