microcode_ctl security, bug fix and enhancement update

2:2.1-73.11.0.1 - for Intel, do not trigger load if on-disk microcode is not an update Orabug: 30634727 - set earlymicrocode='no' in virtualized guests to avoid early load bugs Orabug: 30618736 - ensure late loading fixes are present on 4.1.12- and 4.14.35- - enable early and late load for 5.4.17...