Don't require a pty for intercept or log_subcmmds.

The code to take back control of the tty before a policy check
doesn't appear to be needed.  If the command is run in its own pty,
sudo has control over the user's tty.  If the command is run in
the user's tty, sudo should be in the foreground process group.

src/exec.c

@@ -322,7 +322,7 @@ sudo_needs_pty(struct command_details *details)
 {
     struct plugin_container *plugin;
 
-    if (ISSET(details->flags, CD_USE_PTY|CD_INTERCEPT|CD_LOG_SUBCMDS))
+    if (ISSET(details->flags, CD_USE_PTY))
 	return true;
 
     TAILQ_FOREACH(plugin, &io_plugins, entries) {