Add support for libmng (MNG images)
| Package | Local Description (use.local.desc) | Metadata Description (metadata.xml) |
|---|---|---|
| app-office/magicpoint | - | - |
| games-engines/stratagus | - | - |
| media-gfx/gimp | - | - |
| media-libs/devil | - | - |
| media-libs/freeimage | - | - |
| media-libs/xine-lib | - | - |
| media-video/mplayer | MNG input support | MNG input support |