patch 7.4.1341
Problem:    It's difficult to add more arguments to ch_sendraw() and
            ch_sendexpr().
Solution:   Make the third option a dictionary.
diff --git a/src/os_unix.c b/src/os_unix.c
index 0059c9e..1f0f2c8 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -5127,7 +5127,7 @@
 # ifdef FEAT_CHANNEL
     channel_set_pipes(channel, fd_in[1], fd_out[0], fd_err[0]);
     channel_set_job(channel, job);
-    channel_set_mode(channel, options->jo_mode);
+    channel_set_options(channel, options);
 #  ifdef FEAT_GUI
     channel_gui_register(channel);
 #  endif