webp: fix capitalization of the word Exif

Also remove "webp:" from log messages. Using the AVCodecContext is enough.

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc_ps: Override max_dec_pic_buffering when its inconsistent with num_reorder_pics

Fixes Ticket3304

Alternatively max_dec_pic_buffering could be removed completely as its not used.

Based on a patch by Jose Santiago <santiago@haivision.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>