Issue description

It'd be nice to be able to highlight/color text based on regexp match. This comes in hand when connecting to devices which do not color text (network gear, firewalls, etc).

There is already a patch for this, could that be merged into master, or a better alternative be created?

Required information

Please provide the following information:

• tmux version (tmux -V). next-3.3
• Platform (uname -sp). Linux unknown (arch)