Merge tag '3.21.500-g88270a0' into develop

Rel

* tag '3.21.500-g88270a0':
  Updated setup.sh
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release frege-3.21.500-g88270a0
Updated to 3.21.586-g026e8d7
[maven-release-plugin] prepare release frege-3.21.586-g026e8d7
[maven-release-plugin] prepare for next development iteration
Merge branch 'release/3.21.586-g026e8d7'

* release/3.21.586-g026e8d7:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release frege-3.21.586-g026e8d7
  Updated to 3.21.586-g026e8d7