OpenImageIO v2.4.6.0

Release 2.4.6 (1 Dec 2022) -- compared to 2.4.5.0

• make_texture / maketx : ensure proper setting of certain metadata when
  using a texture as a source to build another texture. #3634
• Build: Make sure use of ${PROJECT_NAME} doesn't occur before the call to
  project(). #3651
• Fix null pointer dereference when OCIO no configuration is found. #3652
• Support for building against OpenColorIO 2.2. #3662
• Fixes to subtle bugs when ImageBuf is used with IOProxy. #3666
• oiiotool: Fix problems with --point when there is no alpha channel. #3684
• oiiotool: --dumpdata fix channel name output. #3687
• BMP: Fix possible write errors, fixes TALOS-2022-1653 / CVE-2022-43594,
  CVE-2022-43595. #3673
• DPX: Fix possible write errors, fixes TALOS-2022-1651 / CVE-2022-43592 and
  TALOS-2022-1652 / CVE-2022-43593. #3672
• IFF files: Add IOProxy support. #3647
• IFF: Fix possible write errors, fixes TALOS-2022-1654 / CVE-2022-43596,
  TALOS-2022-1655 / CVE-2022-43597 CVE-2022-43598, TALOS-2022-1656 /
  CVE-2022-43599 CVE-2022-43602 #3676
• PSD: Fix thumbnail extraction. #3668
• PSD: when reading, don't reject padded thumbnails. #3677
• Raw: Update Exif orientation if user flip is set. #3669
• Zfile write safety, fixes TALOS-2022-1657 / CVE-2022-43603. #3670
• filesystem.h: new Filesystem::is_executable() and find_program(). #3638
• filesystem.h: Change IOMemReader constructor to take a const buffer
  pointer. #3665
• strutil.h: new trimmed_whitspace(). #3636
• New OIIO::print() exposes Strutil::print() in the main OIIO namespace.
  #3667
• Testing: improved testing of oiiotool #3637 #3643 #3649, Strutil #3655