On startup, if running in a terminal, save the termios properties.
Use the saved termios for `:terminal` and `jobstart()` pty jobs.
This won't affect nvim spawned outside of a terminal.
questions:
- This affects `:terminal` and `jobstart({'pty'✌️true})`.
Should we be more conservative for `jobstart({'pty'✌️true})` (e.g.
pass NULL to forkpty() and let the OS defaults prevail)?
- Note: `iutf8` would not be set in that case.
Processes in vim are always started in the current directory, which
causes issues when the process is a daemon and the current directory is
a mountpoint. Fix this by adding an option to set the cwd of the new
process with jobstart(). In addition, fix termopen() so that it actually
uses the cwd option from the dict (it couldn't previously set the cwd
value due to dead code).
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
