- ESC[?u goes to every VT100-like terminal at attach, whatever the
options.
- A reply turns on a new kittykeys terminal feature. Users can force
it on or off with terminal-features kittykeys, including kittykeys@
to turn it off.
- Changing extended-keys now takes effect immediately for attached
clients (options.c).
Use, per client, when extended-keys is on: Kitty for clients that have
kittykeys, modifyOtherKeys for clients with extkeys, VT10x otherwise.
Pane side:
- Applications can request either protocol; Kitty wins if one asks for
both.
- Each application gets what it asked for, whichever client typed the
key.
- ESC[?u is answered truthfully.
- The per-client gate is gone. window.c and popup.c are simply
master's versions again.
extended-keys always is back to its master meaning, forcing
modifyOtherKeys mode 1 only. Forcing Kitty on every program would have
sent bash ESC[97;5u for Ctrl-A.
extended-keys-format kitty is still accepted, but now behaves the same
as csi-u.
