Log message:
openimageio: updated to 2.2.20.0

Release 2.2.20 (1 Feb 2022) -- compared to 2.2.19

Fix some address sanitizer failures.
Build/CI: Deal with OpenColor renaming its master branch to main.
Windows: Fix error when compiling with MSVC.
Fix excessive memory usage when saving EXR with many channels.
TIFF: now works for 16-bit palette images.
Fix ImageBuf::read bug for images of mixed per-channel data types.

Release 2.2.19 (1 Nov 2021) -- compared to 2.2.18

Better catching of exceptions thrown by OCIO 1.x if it encounters 2.0 config files.
Address new warnings revealed by clang 13.
Fixed some minor python binding bugs.
Fix when building with Clang on big-endian architectures.
Fix occasional build breaks related to OpenCV headers.
Improvements to NetBSD and OpenBSD support..
Fixes to work with the libraw 202110 snapshot.

Release 2.2.18 (1 Sep 2021) -- compared to 2.2.17

Honor env variable CUE_THREADS (used by OpenCue) to set the default size of \ 
OIIO's thread pool.
Compatibility with OpenColorIO 2.1.
Dev: Extend Sysutil::getenv() to take a default if the environment variable is \ 
not found.

Release 2.2.17 (1 Aug 2021) -- compared to 2.2.16

Output to DPX files now supports IOProxy. (Input already did.)
typedesc.h: TypeDesc can now describe 2D and 3D bounding boxes, as arrays of 2 \ 
VEC2 aggregates (for 2D) or VEC3 aggregates (for 3D) with "BOX" \ 
semantic. The shorthand for these are TypeBox2, TypeBox3 (for float), and \ 
TypeBox2i and TypeBox3i for integer or pixel coordinte boxes.
Build: Fixes for building against fmt 8.0.0.
Build: Finding boost is more flexible when desiring static libraries.

Log message:
*: Recursive revbump from boost 1.78.0

Log message:
graphics: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Log message:
Recursive revbump for multimedia/libaom

Log message:
graphics: Remove SHA1 hashes for distfiles

Log message:
openimageio: Needs atomic64 to build on i386.

Log message:
revbump for boost-libs

Log message:
Recursive revbump for graphics/libraw.

Log message:
*: recursive bump for openexr 3.1

Log message:
openimageio: updated to 2.2.16

Release 2.2.16
* New UDIM texture name patterns recognized: `%(UDIM)d` is the Houdini
  convention, and `_u##v##` is for Animal Logic's internal renderer.
* When doing color space transforms on images with > 4 channels -- the
  additional channels are now copied unaltered, rather than leaving them
  black.
* FFMpeg: fix some encodings that didn't correctly recognize that they were
  more than 8 bits, or had alpha.
* farmhash.h: Clean up all non-namespaced preprocessor symbols that are set
  by this header and may pollute the caller's symbols.
* Fix crashes on M1 (ARM) based Mac.
* Bug fix: avid divide-by-0 error computing chunk size for invalid image
  sizes.
* `make_texture` (and `maketx` and `oiiotool -otex`) no longer crash if you
  try to make a texture out of a "deep" image; instead it will return an
  error message.
* filesystem.h: Improve exception safety in Filesystem directory iteration.
* Build: Improve finding of OpenJPEG.
* Build: Support for building OIIO with gcc 11.
* Build: Fixes to accommodate Imath 3.1 upcoming changes.
* Build: Finding FFMpeg now correctly detects the version.
* Build: clang + C++17 + LibRaw < 0.20 are mutually incompatible. Detect
  this combination and warn / disable libraw under those conditions.
* Build: Fix CMake behavior for `REQUIRED_DEPS` due to a typo.
* Build: Fixes for detecting and using Ptex, among other things got the
  version wrong.
* Testing: If a feature is disabled, skip its tests rather than reporting
  them as broken.
* CI: Test the combination of clang and C++17.