mingw: add missing namespace

Problems: reimplementation of strlcpy, CMake does not use pkg-config for NSS, wrong pc generated by autoconf with GNUTLS

* Update array.hpp

Problem:Calling back on an empty container causes undefined behavior.
Solution:Check with the function empty()

* Create xqcool.mq

Adds relicensing grant

Solution: check correct preprocessor define in test_reconnect_ivl to match the
test invocation

Solution: initialize local variable in all cases to false positive
compiler warning

Solution: add it to one build to exercise all the code paths

Solution: add it to the Requires.private list

Solution: use pkg-config by default and FindPackage only as a
fallback

Solution: use libbsd by default when available, and the internal implementation
only as a fallback, to take advantage of Linux distros maintenance of the
string libraries.

Avoid possible buffers overruns in ws_engine

Various improvements

Solution: use memcpy with known size instead

Solution: use strcpy_s instead (define custom if not available)

Solution: add static

Solution: removed them

Solution: move initialization to declaration

Solution: modify it in loop body only

Solution: remove the redundant one

Solution: remove them

Solution: just copy the address

Solution: use std::string instead

Solution: properly guard members and options

Solution: use memcpy with known length

Fix set cpu affinity

Solution: Set correct define in CMake check and add the cmakedefine

Fix windows signaler regression

Solution: add comments and remove continue/break

This reverts commit 4f77cfa3.

Make use of = default and = delete if available

Solution: unshallow clone in analysis job

Solution: introduce macros ZMQ_DEFAULT and ZMQ_NON_COPYABLE_NOR_MOVABLE

Solution: Remove definition

Improvements to static analysis & resolve some issues identified by static analysis

Solution: update to clang-format 8

Solution: change to const references

Solution: remove else

Solution: run clang-format

Solution: add const