main: add --print-pid=FILE|FD

When specified, our PID is written to the specified file (or FD),
after we've successfully started up.

completions/zsh/_foot

@@ -9,6 +9,8 @@ _arguments \
     '(-s --server)'{-s,--server}'[run as server; open terminals by running footclient]:server:_files' \
     '--hold[remain open after child process exits]' \
     '(-p --print-pid)'{-p,--print-pid}'[print PID to this file or FD when up and running (server mode only)]:pidfile:_files' \
+    '(-l --log-colorize)'{-l,--log-colorize}'[enable or disable colorization of log output on stderr]:logcolor:(never always auto)' \
+    '(-S --log-no-syslog)'{-s,--log-no-syslog}'[disable syslog logging (server mode only)]' \
     '(-v --version)'{-v,--version}'[show the version number and quit]' \
     '(-h --help)'{-h,--help}'[show help message and quit]'
 

completions/zsh/_footclient

@@ -4,6 +4,7 @@ _arguments \
     -s \
     '(-t --term)'{-t,--term}'[value to set the environment variable TERM to (foot)]:term:->terms' \
     '(-s --server-socket)'{-s,--server-socket}'[override the default path to the foot server socket (XDG_RUNTIME_DIR/foot.sock)]:server:_files' \
+    '(-l --log-colorize)'{-l,--log-colorize}'[enable or disable colorization of log output on stderr]:logcolor:(never always auto)' \
     '(-v --version)'{-v,--version}'[show the version number and quit]' \
     '(-h --help)'{-h,--help}'[show help message and quit]'