Merge pull request #3782 from 9rnsr/fix_vgc

[trivial] Fix -vgc help text
Merge pull request #3776 from yebblies/issue12833

Issue 12833 - switch statement does not work properly when -inline used
Merge pull request #3783 from 9rnsr/fix13154

[REG2.066a] Issue 13154 - Incorrect init of static float array when sliced
Merge pull request #3785 from yebblies/issue13161

[DDMD] Issue 13161 - Wrong offset of extern(C++) class member
Merge pull request #3786 from 9rnsr/2.066

Cherry-picking commits from master to 2.066 branch (for beta5)