Hide VS turd.
Default Travis clang build fails on unused variable 'MAX_SENDS'.
Merge pull request #1172 from evoskuil/master

Fix clang build break from unused var.
Fix configure warning.
Clean up after using randombytes from libsodium

When Curve authentication is used, libsodium opens a file
descriptor to /dev/urandom to generate random bytes. When
the ZMQ context terminates, it should ensure that file gets
closed.
Merge pull request #1174 from jbreams/master

Clean up after using randombytes from libsodium
Fix potential redefinition of common DEBUG symbol, replace tabs.
Merge pull request #1173 from evoskuil/master

Fix configure warning.
Problem: undocumented limit on IPC paths in Linux is 107 chars

Solution: document the limit of 113 chars including ipc://. We might
fix this in libzmq by shortening an over-long IPC pathname into a
unique string; so long as this is done consistently in bind and in
connect, it will save applications from weird failures when they
use external data to generate IPC pathnames.
Merge pull request #1176 from hintjens/master

Problem: undocumented limit on IPC paths in Linux is 107 chars