no need to GC scan the .rodata segment

- Also _deh_end will have to live in .data for PIC code
  (Bugzilla 11171), so it can't be used as end of .rodata.
Merge pull request #715 from MartinNowak/dontScanRODATAonFBSD

[dll] FreeBSD must not GC scan .rodata
Replace AssociativeArray struct with UFCS methods
Merge pull request #668 from yebblies/fixaarray

Replace AssociativeArray struct with UFCS methods
Fix for issue 11981
Switch to using pthread_key_t for Thread reference on Posix
Use atomic ops in host test
pthread_key_delete(); Don't use pthread_key_t on OSX
missing else
Merge pull request #719 from radcapricorn/host_test_atomic_ops

DRuntime: Use atomic ops in host test
Merge pull request #718 from radcapricorn/issue_11981

Fix for issue 11981 - deadlock during thread initialization on Posix
Initial implementation (Posix support mostly)