Merge branch 'da/rhel7-lacks-uncompress2-and-c99'

Adjust build on RHEL 7 to explicitly ask C99 support and use the fallback implementation of uncompress2 we ship. * da/rhel7-lacks-uncompress2-and-c99: build: centos/RHEL 7 ships with an older gcc and zlib

Junio C Hamano committed Jan 17, 2022 at 15:15 UTC b56bd95bbc8f716cb8cbb5fdc18b9b0f00323c6a

No changes.