DOCFMT is overwritten by d-programming-language.org's makefile
Add external implemented callWithStackShell for Linux/PPC64.

This is required for the garbage collector.
Merge pull request #485 from redstar/ppcthread

Add external implemented callWithStackShell for Linux/PPC64.
Merge pull request #484 from dawgfoto/fix10036

DOCFMT is overwritten by d-programming-language.org's makefile
Issue 10081 - Incorrect char array comparison

`char[]` type info is incorrectly inherited from `byte[]` type info instead of `ubyte[]` one so char arrays are compared like arrays of signed bytes.

Issue URL: http://d.puremagic.com/issues/show_bug.cgi?id=10081
Merge pull request #486 from denis-sh/fix-Issue-10081

Issue 10081 - Incorrect char array comparison