libjpeg-turbo 3.0.0 release

[afontenot]

libjpeg-turbo just made a major release, and it's affecting some users of mozjpeg on Arch Linux.

The most popular option users have for installing mozjpeg results in it taking over the functions of libjpeg-turbo as a drop in replacement. Arch Linux, as a rolling distro, just rebuilt libtiff against the libjpeg-turbo 3.0.0 release, and it links against symbols that are new to that version, e.g. jpeg12_write_raw_data. This results in broken applications (including e.g. Firefox and several display managers) that depend on libtiff.

I'm documenting this issue here so that we can track when 3.0.0 is merged into the mozjpeg tree. If you have any particular advice regarding options to backport the relevant changes for Arch Linux in the mean time, that would be appreciated as well.