Problem: std::condition_variable can only be used with std::unique_lock<std::mutex>, leading to two mutexes used in condition_variable_t

Solution: use std::condition_variable_any instead

Problem: cannot monitor state of queues at runtime

Solution: add API and ZMQ_EVENT_PIPES_STATS event which generates 2
values, one for the egress and one for the ingress pipes respectively.
Refactor the events code to be able to send multiple values.

Solution: refactor code and add extra frame with value count before the
values in v2

Solution: expect additional events

Solution: update it

Solution: do it, as above 32 bytes they might be on the heap

Solution: check for the available version instead

Solution: add it to doc/Makefile.am

Solution: fix formatting

Solution: remove them for now

Revert 64 bit assertions

This reverts commit ac19d5f4.

This partially reverts commit 19c6aa5c.

Add test for ZMQ_BINDTODEVICE

Solution: return an error to the user instead

Solution: add test case run with cap_net_admin
Fixes #3397

Problem: test build fails on 32 bit systems

Solution: define UNITY_SUPPORT_64 to force 64 bit support

Fix regression introduced by 68d520ef

Solution: run clang-format

Solution: added TODO comment for now

Solution: move unblock call to original location

Solution: make compilation conditional

Solution: add test case

Solution: restore "local" flag values in call to resolve

Fixes #3394

Problem: invoking the conditional variable for zero time is expensive

Add v2 monitoring ipc/tipc tests

Solution: for zero timeout, unlock and relock immediately instead of timedwait

Solution: increase size to 256

Solution: use addrlen to determine the length

Solution: rename data member

Solution: use memcpy instead

Solution: output as hex instead

Solution: add test cases

Problem: build broken with newer gcc

Solution: add missing includes to stream_listener_base

Problem: close always fails with wildcard bind, since directory is no…

Solution: unlink the socket file first

Problem: missing include directive for close/closesocket