robbyrussell/oh-my-zsh — pull request #2533 by AndrewKvalheim (2014-02-13 20:35:16+00:00)
Title: [plugins/tmux] Support automatic session grouping

The current behavior with `ZSH_TMUX_AUTOCONNECT` enabled is to attach to an existing session. This change adds `ZSH_TMUX_GROUP`, which if enabled will group with an existing session instead.

This allows multiple terminals to share the same set of windows but display different active windows.