Some large file support enhancements

The normal functions should be aliases to the *64 functions,
even if _LARGEFILE64_SOURCE is false. _LARGEFILE64_SOURCE is
more or less deprecated.
remove _inUnitTest flag

- it was used to suppress stderr message during unit test
remove print functions
fix
Issue 9099 - core.atomic.atomicLoad() cannot handle non-POD structs
Added TypeInfo override methods to object.di.
Merge pull request #372 from klickverbot/object-di-add-typeinfo-overrides

Added missing TypeInfo methods declarations to object.di.
Merge pull request #367 from dawgfoto/Fixup5375

remove _inUnitTest flag
Added core.sys.posix.grp (from Posix <grp.h>).

No Solaris declarations for now.
files missing from manifest
always create zip file
Added core.sys.posix.grp to all make files.
Added XSI prototypes.
Fix a few issues in posix.mak
Remove debug echo
Put the optional prototypes into per-platform version statements.
Merge pull request #374 from andralex/master

Fix a few issues with posix.mak
Added nothrow...
Made the void() functions trusted.
Merge pull request #373 from s-ludwig/master

Add core.sys.posix.grp to complement core.sys.posix.pwd
Add an LREF and document CArgs properly.