Update to guide for mjpeg passthrough

Closes #773

Author: Mr-DaveDev

motion_config.html

@@ -2992,19 +2992,22 @@ <h3><a name="netcam_highres"></a> netcam_highres </h3>
           <li> Default: Not defined</li>
         </ul>
         <p></p>
-        The network camera high resolution URL.  This option can be used in conjunction with the netcam_url for rtsp/rtmp cameras.
-        Users may specify the normal resolution url in the netcam_url which will be used for the motion detection and then
-        specify the high resolution url for this parameter.  Motion detection on the normal resolution will trigger the saving
-        of images from the high resolution stream. Note that the ONLY overlay that will be present on the resulting high
-        resolution pictures and movies is the privacy mask.  The other overlays such as date/time, motion boxes, camera
-        name, etc will not be included.  Users wishing to see those overlays on the resulting images and movies will need to
-        specify the high resolution url as the netcam_url and not use this option.
+        The network camera high resolution URL.  This option can be used in conjunction with the netcam_url for
+        rtsp/rtmp/mjpeg cameras. Users may specify the normal resolution url in the netcam_url which will be used for
+        the motion detection and then specify the high resolution url for this parameter.  For mjpeg cameras,
+        the url must use the <code>mjpeg</code> prefix and not <code>http</code>.
+        <br>
+        Motion detection on the normal resolution will trigger the saving of images from the high resolution stream.
+        Note that the ONLY overlay that will be present on the resulting high resolution pictures and movies is the
+        privacy mask.  The other overlays such as date/time, motion boxes, camera name, etc will not be
+        included.  Users wishing to see those overlays on the resulting images and movies will need to specify the
+        high resolution url as the netcam_url and not use this option.
         <p></p>
         If the netcam_url is not specified, this option is ignored.
         <p></p>
-        When this option is used with the <a href="#movie_passthrough">movie_passthrough</a> even less processing occurs.  Since
-        the <a href="#movie_passthrough">movie_passthrough</a> bypasses decoding the stream, images will be saved only as normal
-        resolution and the privacy mask will not be overlaid on to the high resolution images.
+        When this option is used with the <a href="#movie_passthrough">movie_passthrough</a> even less processing occurs.
+        Since the <a href="#movie_passthrough">movie_passthrough</a> bypasses decoding the stream, images will be saved
+        only as normal resolution and the privacy mask will not be overlaid on to the high resolution images.
         <p></p>
 
         <h3><a name="netcam_userpass"></a> netcam_userpass </h3>
@@ -4413,8 +4416,9 @@ <h3><a name="movie_passthrough"></a> movie_passthrough </h3>
           <li> Default: off</li>
         </ul>
         <p></p>
-        When using a RTSP or RTMP camera, create movie files of the motion with the packets obtained directly from
-        the camera.
+        When using a RTSP, RTMP or mjpeg camera, create movie files of the motion with the packets obtained directly
+        from the camera.  For mjpeg cameras, the url must be specified using the <code>mjpeg</code> prefix rather than
+        as <code>http</code>
         <p></p>
         When using only the single <a href="#netcam_url">netcam_url</a> this option will reduce the processing
         required when encoding the images to the resulting movie file.  Decoding of the image will still occur on the