linking fd to pipe identity via socket option
Merge pull request #1019 from willstrang/master

Issue #1017: add ZMQ_HANDSHAKE_IVL time limit on connection handshake
Add failing test reproducing issue #1015.

There is a race condition when connect and bind on a new inproc
endpoint happen "simultaneously" in threads.  Causes the error:
  Assertion failed: ok (ctx.cpp:474)
Mark failing test for issue #1015 as XFAIL
store also here!
add untracked test_stream_timeout into .gitignore and tests/Makefile.am
Merge pull request #1022 from danielhtshih/master

add untracked test_stream_timeout into .gitignore and tests/Makefile.am
Split plain_mechanism into client and server part
Merge pull request #1023 from hurtonm/master

Split plain_mechanism into client and server part
 merge to upstream
patch cleanup
Update  cmake for split of plain_mechanism
Merge pull request #1024 from sdrsdr/identity_fd

Implement ZMQ_IDENTITY_FD sock option for linking socket identity to FD
docu
Merge remote-tracking branch 'upstr/master' into identity_fd
Merge pull request #1025 from ricnewton/master

Update  cmake for split of plain_mechanism
Merge pull request #1026 from sdrsdr/identity_fd

Documentation for ZMQ_IDENTITY_FD sockopt
Updated libsodium imports.
Ignore error on concurrent file copy in parallel VS builds.
Batched VS builds.