Elementary support for QNX added to configure.ac

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
Merge remote-tracking branch 'upstream/master'
Fixed mismatched nn_glock_lock/nn_glock_unlock

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
Max Drechsler added to AUTHORS file

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
In case of an nn_err_abort(), flush stderr. Else you might not see anything.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/core/global.c
	src/utils/err.h
Make Windows builds with stdint.h available actually use it.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
Patched windows poll to behave like linux OS in case we have  empty file descriptor sets.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
Merge remote-tracking branch 'upstream/master'
Minor optimisation of nn_poll() on Windows.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
nn_efd binds to fixed port using SO_REUSEADDR lead to undefined
behaviour
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/core/poll.c