doc/APIchanges: Update

doc/APIchanges

@@ -19,11 +19,11 @@ API changes, most recent first:
   Add av_hwframe_map() and associated AV_HWFRAME_MAP_* flags.
   Add av_hwframe_ctx_create_derived().
 
-2017-03-xx - xxxxxxx - lavu 55.52.100 - avutil.h
+2017-03-29 - bfdcdd6d82 - lavu 55.52.100 - avutil.h
   add av_fourcc_make_string() function and av_fourcc2str() macro to replace
   av_get_codec_tag_string() from lavc.
 
-2017-03-xx - xxxxxxx - lavf 57.68.100 - avformat.h
+2017-03-27 - ddef3d902f - lavf 57.68.100 - avformat.h
   Deprecate that demuxers export the stream rotation angle in AVStream.metadata
   (via an entry named "rotate"). Use av_stream_get_side_data() with
   AV_PKT_DATA_DISPLAYMATRIX instead, and read the rotation angle with
@@ -31,19 +31,19 @@ API changes, most recent first:
   "rotate" entry to AVStream.metadata, AV_PKT_DATA_DISPLAYMATRIX side data has
   to be added to the AVStream.
 
-2017-03-xx - xxxxxxx - lavc 57.85.101 - avcodec.h
+2017-03-23 - 7e4ba776a2 - lavc 57.85.101 - avcodec.h
   vdpau hardware accelerated decoding now supports the new hwaccel API, which
   can create the decoder context and allocate hardware frame automatically.
   See AVCodecContext.hw_device_ctx and AVCodecContext.hw_frames_ctx.
 
-2017-03-xx - xxxxxxx - lavc 57.85.100 - avcodec.h
+2017-03-23 - 156bd8278f - lavc 57.85.100 - avcodec.h
   Add AVCodecContext.hwaccel_flags field. This will control some hwaccels at
   a later point.
 
 2017-03-21 - xxxxxxx - lavf 57.67.100 / 57.08.0 - avio.h
   Add AVIO_SEEKABLE_TIME flag.
 
-2017-03-21 - xxxxxxx - lavf 57.66.105, lavc 57.83.101 - avformat.h, avcodec.h
+2017-03-21 - d682ae70b4 - lavf 57.66.105, lavc 57.83.101 - avformat.h, avcodec.h
   Deprecate AVFMT_FLAG_KEEP_SIDE_DATA. It will be ignored after the next major
   bump, and libavformat will behave as if it were always set.
   Deprecate av_packet_merge_side_data() and av_packet_split_side_data().
@@ -55,7 +55,7 @@ API changes, most recent first:
 2017-03-20 - 9c2436e - lavu 55.49.100 - pixdesc.h
   Add AV_PIX_FMT_FLAG_BAYER pixel format flag.
 
-2017-03-18 - xxxxxxx - lavfi 6.77.100 - avfilter.h
+2017-03-18 - 3796fb2692 - lavfi 6.77.100 - avfilter.h
   Deprecate AVFilterGraph.resample_lavr_opts
   It's never been used by avfilter nor passed to anything.
 
@@ -64,38 +64,38 @@ API changes, most recent first:
   and projection-specific properties (bound_left, bound_top, bound_right,
   bound_bottom, padding) to AVSphericalMapping.
 
-2017-03-02 - xxxxxxx - lavc 57.81.104 - videotoolbox.h
+2017-03-02 - ade7c1a232 - lavc 57.81.104 - videotoolbox.h
   AVVideotoolboxContext.cv_pix_fmt_type can now be set to 0 to output the
   native decoder format. (The default value is not changed.)
 
-2017-03-02 - xxxxxxx - lavu 55.47.101, lavc 57.81.102, lavf 57.66.103
+2017-03-02 - 554bc4eea8 - lavu 55.47.101, lavc 57.81.102, lavf 57.66.103
   Remove requirement to use AVOption or accessors to access certain fields
   in AVFrame, AVCodecContext, and AVFormatContext that were previously
   documented as "no direct access" allowed.
 
-2017-02-13 - xxxxxxx - lavc 57.80.100 - avcodec.h
+2017-02-13 - c1a5fca06f - lavc 57.80.100 - avcodec.h
   Add AVCodecContext.hw_device_ctx.
 
-2017-02-11 - xxxxxxx - lavu 55.47.100 - frame.h
+2017-02-11 - e3af49b14b - lavu 55.47.100 - frame.h
   Add AVFrame.opaque_ref.
 
 2017-01-31 - xxxxxxx - lavu 55.46.100 / 55.20.0 - cpu.h
   Add AV_CPU_FLAG_SSSE3SLOW.
 
-2017-01-24 - xxxxxxx - lavu 55.45.100 - channel_layout.h
+2017-01-24 - c4618f842a - lavu 55.45.100 - channel_layout.h
   Add av_get_extended_channel_layout()
 
-2017-01-22 - xxxxxxx - lavu 55.44.100 - lfg.h
+2017-01-22 - 76c5a69e26 - lavu 55.44.100 - lfg.h
   Add av_lfg_init_from_data().
 
-2017-01-xx - xxxxxxx - lavc 57.74.100 - vaapi.h
+2017-01-17 - 2a4a8653b6 - lavc 57.74.100 - vaapi.h
   Deprecate struct vaapi_context and the vaapi.h installed header.
   Callers should set AVCodecContext.hw_frames_ctx instead.
 
-2017-01-12 - xxxxxxx - lavfi 6.69.100- buffersink.h
+2017-01-12 - dbe9dbed31 - lavfi 6.69.100- buffersink.h
   Add av_buffersink_get_*() functions.
 
-2017-01-06 - xxxxxxx - lavf 57.62.100- avio.h
+2017-01-06 - 9488032e10 - lavf 57.62.100- avio.h
   Add avio_get_dyn_buf()
 
 2016-12-10 - xxxxxxx - lavu xx.xx.100- imgutils.h
@@ -109,17 +109,17 @@ API changes, most recent first:
   Add AV_FRAME_DATA_SPHERICAL value, av_spherical_alloc() API and
   AVSphericalMapping type to export and describe spherical video properties.
 
-2016-11-18 - xxxxxxx - lavf 57.58.100 - avformat.h
+2016-11-18 - 2ab50647ff - lavf 57.58.100 - avformat.h
   Add av_stream_add_side_data().
 
-2016-xx-xx - xxxxxxx - lavu 55.39.100 - hwcontext_vaapi.h
+2016-11-13 - 775a8477b7 - lavu 55.39.100 - hwcontext_vaapi.h
   Add AV_VAAPI_DRIVER_QUIRK_ATTRIB_MEMTYPE.
 
-2016-xx-xx - xxxxxxx - lavu 55.38.100 - hwcontext_vaapi.h
+2016-11-13 - a8d51bb424 - lavu 55.38.100 - hwcontext_vaapi.h
   Add driver quirks field to VAAPI-specific hwdevice and enum with
   members AV_VAAPI_DRIVER_QUIRK_* to represent its values.
 
-2016-11-10 - xxxxxxx - lavu 55.36.100 - pixfmt.h
+2016-11-10 - 638b216d4f - lavu 55.36.100 - pixfmt.h
   Add AV_PIX_FMT_GRAY12(LE/BE).
 
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