scripts: Adds a convenient tmux startup script.

TODO: In this script, the existince of the target session should be tested
before creating anything else. Exit cleanly or simply connect if it does.

Signed-off-by: Wayne Warren <waynr@sdf.org>
scripts: Minor fixes to admin-session.sh

Signed-off-by: Wayne Warren <waynr@sdf.org>
Merge remote-tracking branch 'origin/master'