* .github/workflows/vm1-ci.yml
* .github/workflows/vm2-ci.yml
* updated to always set number of CPUs for -j GNU make switch,
using unlimited number of forks (-j without parameter) causes
'Resource temporarily unavailable' error
* .github/workflows/linux-ci.yml
! Linux CI build fix (outdated packages).
* .github/workflows/vm1-ci.yml
+ .github/workflows/vm2-ci.yml
+ Added an OmniOS CI build.
! Switched FreeBSD CI build to vmactions/freebsd@v1 action as it's
more stable.