message: Disable release build on FreeBSD
  For some reason, the FreeBSD VM in Jenkins takes 1h for a release build.
  Hence, we disable it for now until further investigation.
diff: @@ -21,7 +21,7 @@ buildMatrix = [
  tools: ['clang'],
  ]],
  ['FreeBSD', [
  - builds: ['debug', 'release'],
  + builds: ['debug'], // no release build for now, because it takes 1h
  tools: ['clang'],
  ]],
  ['Windows', [
  