Pull request #906: CAS-14477
Merge in CASA/casa6 from CAS-14477 to master
* commit 'cc9c2bd2403188e1efdd666fb973f56949e06eed':
Remove extra CMake flags for gsl in readme.md for the macOS installation
Revert "Remove GSL flags from the readme.md file."
Remove GSL flags from the readme.md file.
Implement Renauds's patch in CAS-14477