Modifications and cleanup for compilation on OS/X#42

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waTeim wants to merge 4 commits intoetr:masterfrom

Commits on Feb 13, 2014

Commits on Feb 17, 2014

Change getter to const
waTeim
committed

Commits on Feb 18, 2014

Fixed problem on OS/X; SOCK_CLOEXEC raises EPROTONOSUPPORT instead
waTeim
committed