Add options to configure tunnel host and port

In "adb forward" mode, by default, scrcpy connects to localhost:PORT,
where PORT is the local port passed to "adb forward". This assumes that
the tunnel is established on the local host with a local adb server
(which is the common case).

For advanced usage, add --tunnel-host and --tunnel-port to force the
connection to a different destination.

Fixes #2801 <https://github.com/Genymobile/scrcpy/issues/2801>
PR #2807 <https://github.com/Genymobile/scrcpy/pull/2807>

Signed-off-by: Romain Vimont <rom@rom1v.com>

app/src/scrcpy.c

@@ -345,6 +345,8 @@ scrcpy(struct scrcpy_options *options) {
         .log_level = options->log_level,
         .crop = options->crop,
         .port_range = options->port_range,
+        .tunnel_host = options->tunnel_host,
+        .tunnel_port = options->tunnel_port,
         .max_size = options->max_size,
         .bit_rate = options->bit_rate,
         .max_fps = options->max_fps,