Introduced private constants for the context sanity tag values.
Ignored more MSVC intermmediate files.
Merge pull request #578 from gonzus/master

Changes to sanity tag in ctx
Merge pull request #577 from hintjens/master

API for CURVE configuration
Comments to clarify the socket name function
Merge pull request #579 from ianbarber/master

Clean up socket_type_string
Stop ZMTP handshake when an unexpected message comes
Merge pull request #580 from hurtonm/master

Stop ZMTP handshake when an unexpected message comes
Merge pull request #581 from hintjens/master

Problem: code isn't setting mechanism to CURVE properly
Implement CurveZMQ message encryption and authentication
Implement ZMTP/3.0 CURVE mechanism
Merge pull request #582 from hurtonm/master

Implement CurveZMQ message encryption and authentication
Fix small streamengine issue w/ term and handshake

Also tidy up monitor test a little.
Merge branch 'master' of git://github.com/zeromq/libzmq
Merge pull request #583 from ianbarber/master

Small stream engine issue and test_monitor tidy up
Fix test_disconnect_inproc to work on ILP64 systems
Merge pull request #584 from hurtonm/master

Fix test_disconnect_inproc to work on ILP64 systems
Prints message and exits if app tries to use CURVE without libsodium
Whitespace fix to man page
Fixed spelling in comments
Fixed compile error, needed unistd.h