cmake: use FindSodium module
cmake: correct find function
Merge pull request #995 from hintjens/master

Bumped ABI version to 4.0.0
Add metadata to received messages
Merge pull request #996 from hurtonm/master

Add metadata to received messages
tweetnacl integration
typo
no tweetnacl for windows currently
add metadata
Merge branch 'master' of github.com:soundart/libzmq

Conflicts:
	CMakeLists.txt
Merge pull request #997 from soundart/master

tweetnacl integration for curve
Don't add empty metadata to received messages
Merge pull request #998 from hurtonm/master

Don't add empty metadata to received messages
Include ZMTP properties in message metadata

Metadata are built in stream_engine now.
This makes it easy to extend metadata with user-defined properties.
Merge pull request #999 from hurtonm/master

Include ZMTP properties in message metadata
Add code to investigate data race

Provides control of race windows and logging for some of the interesting transitions.
Enlarge the race window for some test cases

These changes cause an assertion in lb_sendpipe() when executing the test_security_plain testcase.
Merge pull request #1000 from daveab/feature/divide_by_zero_investigation

Feature/divide by zero investigation
Revert "Enlarge the race window for some test cases"

This reverts commit 2a84d2597469d272794a1fb5fb43c6260f335195.

Broke regression test on test_hwm.cpp.
Revert "Add code to investigate data race"

This reverts commit 5e0facda17b986943f0fe40a2dc6c98611655c35.