add volatile load/store to core.bitop
gc.config: updated comments, allow disabling command line processing, change environment var to DRT_GCOPT
Merge branch 'master' of https://github.com/D-Programming-Language/druntime into gc_config_cleanup
configure options at link time
[Refactoring] Reorder file names in MANIFEST and SRCS
[Refactoring] Gather common code in rt.util.typeinfo
fix Issue 13052 - TypeInfo.getHash should return same hash for different floating point zeros.
fix Issue 13661 - static array init does not call destructors

Add internal functions to handle assignment from an array with rvalue elements.
move drt_ variables to rt.config
add function drtConfigOption to retreive an option
show current settings in GC help message
Suppress ddoc highlighting of every occurrence of "memory" in the text.
use rt_ prefix instead of drt_, remove extern(C)
nothrow for Fiber

- remove FiberException

- attribute all functions with nothrow except for call

- add templated Fiber.call(bool rethrow)()
[Refactoring] fix indent style
[Refactoring] A little code cleanup in _aaGetX, _aaGetRvalueX, and _aaInX
[Refactoring] Remove code duplication
Merge pull request #1024 from 9rnsr/refactor_aa

[Refactoring] Remove code duplication in rt/aaA.d
Merge pull request #1011 from quickfur/core_memory_ddoc

[ddoc] Suppress ddoc highlighting of every occurrence of "memory" in the text.
Fix issue 13748 -- benchmark druntime/benchmark/aabench/string.d fails
Merge pull request #1025 from schveiguy/fix13748

Fix issue 13748 -- benchmark druntime/benchmark/aabench/string.d fails
Add missing declarations for Solaris.

- core.sys.posix.grp is not yet implemented
- typo in core.sys.posix.unistd.d