DI Generation Improvements.
Improper permute argument in header.d.
Set +x on the postscripts.
Fix Issue 9195 - Should not be able to index a pointer in safed

Allow pointer arithmetic when using an offset that is known to be zero
Merge pull request #1492 from yebblies/issue9195

Fix Issue 9195 - Should not be able to index a pointer in safed
Merge pull request #1487 from LightBender/digen2

DI Generation Improvements.