tmux new terminfo features in the latest git builds

[fpqc ??]

Hiya Thomas,

I just got partial OSC52 clipboard processing implemented in tmux 
(previously it could emit them but not read them back in), and tmux has 
also supported processing and re-emitting its own 24-bit color sequences 
for a while).  

Therefore, your official terminfo database for the various tmux terminfo 
entries (tmux, tmux-256color) should include the following unofficial 
terminfo extensions:

Tc,
Ms=\E]52;%p1%s;%p2%s\007,

The OSC52 commit to the main branch was earlier today:
https://github.com/tmux/tmux/commit/4ede35c48c089abe3fca0d94dbeac44b2ac442a1


Thank you for you time and attention!

Your humble servant,

Harry J. Gindi