Convert the window pane (pty master side) fd over to use a bufferevent.
The evbuffer API is very similar to the existing tmux buffer API so this was
remarkably painless. Not many possible ways to do it, I suppose.
Initial changes to move tmux to libevent.
This moves the client-side loops are pretty much fully over to event-based only
(tmux.c and client.c) but server-side (server.c and friends) treats libevent as
a sort of clever poll, waking up after every event to run various things.
Moving the server stuff over to bufferevents and timers and so on will come
later.
Add an activity time for clients, like for sessions, and change session and
client lookup to pick the most recently used rather than the most recently
created - this is much more useful when used interactively and (because the
activity time is set at creation) should have no effect on source-file.
Based on a problem reported by Jan Johansson.
If it isn't available explicitly, work out the current client in a similar way
to the current session - build a list of the possibilities then pick the
newest.
Change session and client activity and creation time members to have more
meaningful names.
Also, remove the code to try and update the session activity time for the
command client when a command message is received as is pointless because it
des not have a session.
Double the escape timer (the time after a \033 is received before tmux gives up
waiting to see if it is part of a key sequence and passes it through) to 500
ms, the previous setting was too fast. Suggested by naddy.
When matching the session names with -t, look for exact matches first before
trying partial matches.
Avoids problems where two ambiguous matches are present before an exact match
(eg foo1, foo2, foo would give an error on trying -tfoo), reported by Natacha
Port? natbsd at instinctive dot eu.
Add a flag for jobs that shouldn't be freed after they've died and use it for
status jobs, then only kill those jobs when status-left, status-right or
set-titles-string is changed.
Fixes problems with changing options from inside #().
If any client currently displaying a window pane has more than 1 KB of output
buffered, don't accept any further data from the process running in the pane.
This makes tmux much more responsive when flooded with output, although other
buffers can still have an impact when running remotely.
Prompted by a query from Ranganathan Sankaralingam.
Setting SGR0 when setting the fg and bg has problems if only one of the two is
meant to be default, so rewrite the code to move this outside, move setting
colours before attributes and generally clean up.
Tested by sthen@, fixes problems he was seeing with mutt and should fix some
existing problems with (rarely) lost attributes.
