build: switch preliminary LGPL mode from v3 to v2.1

iive agreed to relicense things that are still in mpv to LGPLv2.1. So
change the licenses of the affected files, and rename the configure
switch for LGPL mode to --enable-preliminary-lgpl2.

(The "preliminary" part will probably be removed from the configure
switch soon as well.)

Also player/main.c hasn't had GPL parts since a few commits ago.

1 files changed, 1 insertions, 9 deletions

diff --git a/video/decode/vd_lavc.c b/video/decode/vd_lavc.c
index ae79554edd..67b9cd4e17 100644
--- a/video/decode/vd_lavc.c
+++ b/video/decode/vd_lavc.c
@@ -4,7 +4,7 @@
  * mpv is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -13,14 +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/>.
- *
- * The parts potentially making this file LGPL v3 (instead of v2.1 or later) are:
- * 376e3abf5c7d2 xvmc use get_format for IDCT/MC recognition
- * c73f0e18bd1d6 Return PIX_FMT_NONE if the video system refuses all other formats.
- * (iive agreed to LGPL v3+ only. Jeremy agreed to LGPL v2.1 or later.)
- * Once these changes are not relevant to for copyright anymore (e.g. because
- * they have been removed), and the core is LGPL, this file will change to
- * LGPLv2.1+.
  */
 
 #include <stdio.h>