the release/generate-release.sh script by nwhitehorn.
This script can use optional configuration file to override defaults,
making running multiple serialzied builds with different specific
configurations or architecture-specific tunings quite easy.
Sample overrideable options are included in the release.conf.sample
file.
Approved by: kib (mentor)
MFC After: 2 weeks
X-MFC-To: stable/9 only
