docs won't build because of missing variables in CoreDDoc mode
update deprecation of MAP_ANON from core.sys.posix.sys.mman

- remove MAP_ANON for linux from core.sys.posix.sys.mman
  (has been deprecated since sep 2013)

- add platform specific headers for mman (OSX, FreeBSD, Solaris, Android)

- add deprecation for other OSes
Revert "update deprecation of MAP_ANON from core.sys.posix.sys.mman"

This reverts commit 51c34ee56db983b3e08dee911f07010f3d4cc4bc.
Move prefix member function attributes to postfix
remove try-catch from AA hashOf
implement aaLiteral
update deprecation of MAP_ANON from core.sys.posix.sys.mman

- remove MAP_ANON for linux from core.sys.posix.sys.mman
  (has been deprecated since sep 2013)

- add platform specific headers for mman (OSX, FreeBSD, Solaris, Android)

- add deprecation for other OSes
Revert "update deprecation of MAP_ANON from core.sys.posix.sys.mman"

This reverts commit 76962185d2b07865a9811cfe0107596db7460492.
Merge pull request #984 from IgorStepanov/hashOf-aa-safe

remove try-catch from AA hashOf
Merge pull request #933 from IgorStepanov/newaa-aaLiteral-and-aaInit

[new AA] implement aaLiteral
Merge pull request #983 from 9rnsr/fix12931

Move prefix member function attributes to postfix
Merge pull request #972 from MartinNowak/fixThreadDocs

[trivial] docs won't build because of missing variables in CoreDDoc mode