Solution: ifdef it

Solution: name it ZMQapp instead of ZMQbg, as it's created by the
application

Solution: use LIBZMQ_UNUSED

Solution: do it and remove ifndef windows

Solution: start at 0

Solution: use / like the rest of the names

Solution: use the thread class function rather than one of the pthread
functions, and take into account the thread prefix context option

Solution:
1. Use optional name parameter in thread_t::start for operating
systems that have thread names.
2. Give start_thread() an optional name parameter for the
thread's name. If this parameter is set, it will be appended to "0MQ:".
If not set, "0MQ" will be used as the thread's name.
3. Give epoll the ability to name its thread. Then use this in
io_thread and reaper to name them.

Solution: change into regular control flow condition

Solution: change variable type to size_t

Solution: move configuration to build definition

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

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: return an error to the user instead

Solution: run clang-format

Solution: added TODO comment for now

Solution: move unblock call to original location

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

Fixes #3394

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

Solution: use addrlen to determine the length

Solution: rename data member

Solution: use memcpy instead

Solution: add missing includes to stream_listener_base

Solution: unlink the socket file first

Solution: add appropriate includes

Solution: use sprintf instead of std::stringstream
Fixes #3385

Solution: use zmq_socklen_t

Solution: reuse string lengths and use memcpy instead

Solution: change preprocessor guard scope

Solution: change to use get_socket_address

Solution: use tcp_open_socket function

Problem: tcp_connecter_t and tcp_listener_t duplicate code around opening and configuring a TCP socket

Solution: extract common parts into tcp_open_socket function

Solution: add const

Solution: let socks_connecter_t derive from stream_connecter_base_t and remove duplicate code

Solution: change back the indentifier endpoint to the one passed by the
user rather than the resolved one, otherwise when the user passes the
same string to the disconnect call they do not match anymore

Solution: fix address passed and refactor set_local_address to remove code duplication and unnecessary address parsing when ZMQ_USE_FD is used

Problem: stream listeners do not provide correct local and remote address information (test_monitor is failing)

Solution: query local and remote addresses on accepting a connection

Solution: query the local address and set it

Solution: pass the local address by subclasses to create_engine