Sync OpenBSD patchset 608:
Sync OpenBSD patchset 608:

Permit S- prefix on keys for shift. Relatively few terminals support this
(basically xterm only) and even fewer have them in terminfo (kLFT2 and kRIT2).


klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux