mxqi: Fix some debugging code/comments

- Set sshd to debug level 4 when --debug is requested
- Remove obsoleted commented-out line
- Add commented-out lines to run special sshd or gdbserver

mxqi/mxqi

@@ -200,11 +200,12 @@ sub server {
     if ($pid == 0) {
         open STDOUT,'>&', $data_socket or die "$!\n";
         open STDIN, '<&', $data_socket or die "$!\n";
+        #exec '/home/buczek/git/openssh/sshd',
+        #exec '/usr/bin/gdbserver', 'localhost:12344', '/home/buczek/git/openssh/sshd',   # localhost ignored. "target remote HOST:12344"
         exec '/usr/sbin/sshd',
             '-i',
             '-f', "$tmpdir/sshd_config",
-            $opt_debug ? ('-E',  $ENV{HOME} . '/.cache/mxqi_debug/server_debug.log', '-d') : (),
-            # '-E', $ENV{HOME} . '/.cache/mxqi_server_debug.log', '-d',
+            $opt_debug ? ('-E',  $ENV{HOME} . '/.cache/mxqi_debug/server_debug.log', '-dddd') : (),
             ;
         die "exec sshd: $!\n";
     }