Revert "Merge commit '61c31e4e'" (configure: Properly set zlib dependencies for all components)

The reverted commit introduced undefined behavior.
undefined in the sense that the evaluation order of the dependencies affects the results

Fixes Ticket2920

This reverts commit c32db6ad, reversing
changes made to 05f1b4e2.

Alternative solutions would be to change the dependency solver to handle non trivial
dependencies or to enable zlib by default before the dependency solver, this would
leave a zlib dependency in the libs though then even when no zlib is needed or used.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

This should fix decoding the file in:
http://ffmpeg.gusari.org/viewtopic.php?f=16&t=1078
No i dont have the file so i cant test
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Thilo Borgmann <thilo.borgmann@mail.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Before this commit, sws_init_context() failed with an error if no scaler
was explicitly set.

Defaulting to something reasonable is better behavior.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

That's the more proper place where the scaler options should be
documented.

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

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

UPDATE_CACHE isnt needed and can cause segfaults
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

The W3C validator complains about these.
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

* cehoyos/master:
  Avoid img_segment_size == 0 in mtv demuxer.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes ticket #3011.

* qatar/master:
  omadec: fix bitrate for ATRAC3+ streams
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '23d0fdcf':
  Add support for multichannel ATRAC3+ streams.

Conflicts:
	libavformat/oma.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '93370d12':
  mxfdec: set audio timebase to 1/samplerate

Conflicts:
	libavformat/mxfdec.c
	tests/ref/fate/mxf-demux
	tests/ref/seek/lavf-mxf
	tests/ref/seek/lavf-mxf_d10

See: 83cab07aMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ff07ec14':
  pcx: Return an error on broken palette if err_detect is set to 'explode'

Conflicts:
	libavcodec/pcx.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd1d99e3b':
  pcx: Check the packet size before assuming it fits a palette
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7ba0cedb':
  rpza: Fix a buffer size check
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'aa0dd524':
  xxan: Disallow odd width

See: 77693c54
See: 8ad9b48cMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'fc739b3e':
  xan: Only read within the data that actually was initialized

Conflicts:
	libavcodec/xan.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '30db94dc':
  xan: Use bytestream2 to limit reading to within the buffer

Conflicts:
	libavcodec/xan.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9fb0de86':
  pcx: Consume the whole packet if giving up due to missing palette

Conflicts:
	libavcodec/pcx.c

See: b4e516e3Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a81cad8f':
  pngdec: Stop trying to decode once inflate returns Z_STREAM_END

Conflicts:
	libavcodec/pngdec.c

See: 65bf9a44Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c2319876':
  mov: Make sure the read sample count is nonnegative

Conflicts:
	libavformat/mov.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '640a2427':
  bfi: Add some very basic sanity checks for input packet sizes
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9fc7184d':
  bfi: Avoid divisions by zero

See: 99a8552dMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a9221e39':
  electronicarts: Add more sanity checking for the number of channels

Note: This check is probably unnecessary
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd07aa3f0':
  riffdec: Add sanity checks for the sample rate
Merged-by: Michael Niedermayer <michaelni@gmx.at>