doc/APIchanges: fill in missing hashes and dates
doc/APIchanges: mark the place where 9 was branched
pcmdec: replace a reachable assert with an error check

Libavformat should not make any assumptions about values returned from
other libraries. This assert is easily reachable by using a non-raw
codec id.
FATE: force FLAC in the lavf ogg test

Since b0c2c09, vorbis would be used if libvorbis is compiled in.
hevc: update conformance streams

New streams: LTRPSPS_A_Qualcomm_1, SLPPLP_A_VIDYO_1, VPSID_A_VIDYO_1
Updated streams: EXT_A_ericsson_4, NUT_A_ericsson_5, RPS_C_ericsson_5,
  RPS_D_ericsson_6

Signed-off-by: Anton Khirnov <anton@khirnov.net>
avplay: add support for seeking to chapter marks
lavf: rewrite the av_interleaved_write_frame() doxy

Remove some vague / incorrect statements and make the text more specific
and less confusing.
lavf: rewrite the av_write_frame() doxy

Remove some vague / incorrect statements and make the text more specific
and less confusing.
lavf: add some basic documentation of the muxing process
lavf: extend / improve the AVFormatContext doxy
build: fix examples compilation when EXESUF is not empty

Due to a wrong substitution doc/examples is not added as a prerequisite
for the objects of the example programs. This results in compiler error
due to the non-existing output directory.

Bug-Id: 636

Signed-off-by: Janne Grunau <janne-libav@jannau.net>
lavf: always unref the packet passed to av_interleaved_write_frame() on error