build: Add missing replaygain object file for CAF demuxer
build: Add missing object files for Matroska demuxer
build: Add missing object files for webm muxer
build: Have the eatqi decoder depend on the MPEG-1 decoder

eatqi uses more than just the shared mpegvideo bits.
build: Record explicit dependency of intrax8 on error resilience
configure: Drop stray error resilience dependencies
mpeg: Mark ff_mpeg_set_erpic() static

It is not used outside of the file.
ape: Replace memset(0) by zero initialization
Replace av_malloc() and memset(0) by av_mallocz()
libx264: Correctly manage constant rate factor params

By default they are set to -1.
Differentiate assembler and assembly in documentation and comments

The language and the program that consumes the language are not the same.
Merge commit '49470b9404583ab3aff6835f78a759349d331696'

* commit '49470b9404583ab3aff6835f78a759349d331696':
  build: Add missing replaygain object file for CAF demuxer

Conflicts:
	libavformat/Makefile

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '03391b5432a2b8b8dbc3d2db722a54dfb68737b9'

* commit '03391b5432a2b8b8dbc3d2db722a54dfb68737b9':
  build: Add missing object files for Matroska demuxer

Conflicts:
	libavcodec/Makefile
	libavformat/Makefile

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '85d805d5cccb2f57e7f2e2254d7a870f05926cfd'

* commit '85d805d5cccb2f57e7f2e2254d7a870f05926cfd':
  build: Add missing object files for webm muxer

Conflicts:
	libavformat/Makefile

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c54e118722cbbdc04945538d1796d4472a1ff406'

* commit 'c54e118722cbbdc04945538d1796d4472a1ff406':
  build: Have the eatqi decoder depend on the MPEG-1 decoder

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'fbf4d2197f35bddccec00ad53185ee4ab81778a0'

* commit 'fbf4d2197f35bddccec00ad53185ee4ab81778a0':
  build: Record explicit dependency of intrax8 on error resilience

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'a6a675a79287565c3c23455439b114676b63a96c'

* commit 'a6a675a79287565c3c23455439b114676b63a96c':
  configure: Drop stray error resilience dependencies

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '8d695dc411c1ae28477f107d6f7bf2db59af95df'

* commit '8d695dc411c1ae28477f107d6f7bf2db59af95df':
  mpeg: Mark ff_mpeg_set_erpic() static

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'f83896abda1e78ebbbda0f184b682b4fabadc682'

* commit 'f83896abda1e78ebbbda0f184b682b4fabadc682':
  ape: Replace memset(0) by zero initialization

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '73953df71a28e94d8959facba7906cf5975ca4ef'

* commit '73953df71a28e94d8959facba7906cf5975ca4ef':
  Replace av_malloc() and memset(0) by av_mallocz()

Conflicts:
	libavformat/matroskadec.c
	libavformat/rmdec.c
	libavformat/utils.c

No change, as none of the split malloc+memset existed in ffmpeg

Merged-by: Michael Niedermayer <michaelni@gmx.at>