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.
move drt_ variables to rt.config
add function drtConfigOption to retreive an option
show current settings in GC help message
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)()
add C mangling depending on toolchain (needed for OSX)
Preparation for the issue 13701 - fix AA.dup for const elements
Merge pull request #1031 from 9rnsr/const_aa_dup

Preparation for the issue 13701 - fix AA.dup for const elements
Add missing alias for c_long_double on Solaris.

cc (sunpro) and gcc on Solaris use 80bit reals for the C `long double` data type.
Merge pull request #1033 from redstar/solaris

Add missing alias for c_long_double on Solaris.
Merge pull request #1021 from MartinNowak/fiberNothrow

nothrow for Fiber
Add missing network declaration for Solaris.

These are required to compile std.socket.
Add more Solaris declarations.

Add missing declations in `core.sys.posix.utime` and `core.sys.posix.utime`.
Merge pull request #1035 from redstar/solaris_net

Add missing network declaration for Solaris.
Merge pull request #1036 from redstar/solaris2

Add more Solaris declarations.