Tagging release 20.20.8.4
Tag of 21.0.20 - last build from SVN
checkpoint pre master->mt merge 2017.03.16
Tagging release 21.0.19
Tagging release 21.0.18
Tagging release 21.0.17
Tagging release 21.0.16
Tagging release 20.20.8.2
Tagging release 20.20.7.7
Tagging release 19.2.5.18
Tagging release 20.20.8.1