player: change license of some code surrounding --frames to LGPL

The original author of the patch has agreed now.

Copyright

@@ -43,7 +43,6 @@ them quite central:
 - many builtin video filters (use libavfilter instead)
 - automatic rotation and stereoscopic video handling
 - Linux TV input
-- the --frames option
 - the add/cycle and sub-add/audio-add/sub-remove/audio-remove commands
 - video format conversion (if not supported by the VO)
 - minor features: jack, DVD, CDDA, SMB, CACA, legacy direct3d VO
@@ -111,10 +110,8 @@ The following files are still GPL only (--enable-lgpl disables them):
 The following files contain some optional GPL code (--enable-lgpl disables it):
 
     input/cmd_list.c                potentially some commands
-    options/options.c               --frames option
     options/parse_commandline.c     dvd:// expansion
     player/audio.c                  libaf glue code
-    player/loadfile.c               --frames option (minor but probably fatal)
     player/osd.c                    OSD level 3
     player/command.c                add/cycle command, possibly sub-add command
 

options/options.c

@@ -13,8 +13,6 @@
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
- *
- * Parts under HAVE_GPL are licensed under GNU General Public License.
  */
 
 #ifndef MPLAYER_CFG_MPLAYER_H
@@ -326,10 +324,7 @@ const m_option_t mp_opts[] = {
 
 // ------------------------- demuxer options --------------------
 
-#if HAVE_GPL
-    // Possibly GPL due to d8fd7131bbcde029ab41799fd3162050b43f6848.
     OPT_CHOICE_OR_INT("frames", play_frames, 0, 0, INT_MAX, ({"all", -1})),
-#endif
 
     OPT_REL_TIME("start", play_start, 0),
     OPT_REL_TIME("end", play_end, 0),

player/loadfile.c

@@ -1193,10 +1193,7 @@ static void play_current_file(struct MPContext *mpctx)
     load_per_file_options(mpctx->mconfig, mpctx->playing->params,
                           mpctx->playing->num_params);
 
-#if HAVE_GPL
-    // Possibly GPL due to d8fd7131bbcde029ab41799fd3162050b43f6848.
     mpctx->max_frames = opts->play_frames;
-#endif
 
     handle_force_window(mpctx, false);
 
@@ -1323,15 +1320,12 @@ reopen_file:
     mp_notify(mpctx, MPV_EVENT_FILE_LOADED, NULL);
     update_screensaver_state(mpctx);
 
-#if HAVE_GPL
-    // Possibly GPL due to d8fd7131bbcde029ab41799fd3162050b43f6848.
     if (mpctx->max_frames == 0) {
         if (!mpctx->stop_play)
             mpctx->stop_play = PT_NEXT_ENTRY;
         mpctx->error_playing = 0;
         goto terminate_playback;
     }
-#endif
 
     double startpos = rel_time_to_abs(mpctx, opts->play_start);
     if (startpos == MP_NOPTS_VALUE && opts->chapterrange[0] > 0) {