doc: Document segment_list_type
rtsp: Factor out fmtp parsing
rtsp: Support misordered fmtp rtpmap

Issue present in Avigilon IP cameras.
hevc: Mark num_bins_in_se as unused

Only its size is actually used. Silence a clang warning.
doc/bitstream_filters: document imxdump

Partially addresses ticket #3198.

Signed-off-by: Lou Logan <lou@lrcd.com>
Tested-by: Dave Rice <dave@dericed.com>
Merge commit '49a242687cf44f86570b706db3c5912ff06bc6c2'

* commit '49a242687cf44f86570b706db3c5912ff06bc6c2':
  doc: Document segment_list_type

Conflicts:
	doc/muxers.texi

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c9c1e00f95350e7a36b0d05a03939c7f6438e371'

* commit 'c9c1e00f95350e7a36b0d05a03939c7f6438e371':
  rtsp: Factor out fmtp parsing

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c385313d2590fd26e26bb9bdacddef78162ab490'

* commit 'c385313d2590fd26e26bb9bdacddef78162ab490':
  rtsp: Support misordered fmtp rtpmap

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '869fc416f7c78ed4e397e0208acd1545771c0502'

* commit '869fc416f7c78ed4e397e0208acd1545771c0502':
  hevc: Mark num_bins_in_se as unused

Merged-by: Michael Niedermayer <michaelni@gmx.at>
ppc: Fix the bug of fft for little endian environment on POWER7 and later

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