Create sockets unblocked and with close-on-exec #180

	# Copyright 2022 Timo Röhling <timo@gaussglocke.de>
	# SPDX-License-Identifier: FSFAP
	#
	# Copying and distribution of this file, with or without modification, are
	# permitted in any medium without royalty provided the copyright notice and
	# this notice are preserved. This file is offered as-is, without any warranty.
	#
	name: Continuous Integration
	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	jobs:
	test:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	milter: [OFF, ON]
	sqlite: [OFF, ON]
	redis: [OFF, ON]
	steps:
	- uses: actions/checkout@v3
	- name: Install dependencies
	run: \|
	sudo apt-get update -qq
	sudo apt-get install -y cmake postfix redis
	- name: Build PostSRSd
	run: \|
	mkdir _build
	cd _build
	cmake .. -DDEVELOPER_BUILD=ON -DWITH_MILTER=${{ matrix.milter }} -DWITH_SQLITE=${{ matrix.sqlite }} -DWITH_REDIS=${{ matrix.redis }}
	make VERBOSE=ON
	- name: Run tests
	run: \|
	cd _build
	ctest --output-on-failure
	- name: Install and start PostSRSd daemon
	run: \|
	cd _build
	sudo make install
	sed -e 's/^#srs-domain.*/srs-domain = "example.com"/' /usr/local/share/doc/postsrsd/postsrsd.conf \| sudo tee /usr/local/etc/postsrsd.conf
	sudo systemctl enable postsrsd
	sudo systemctl start postsrsd
	sudo journalctl --no-pager -u postsrsd
	sudo systemctl --no-pager status postsrsd
	- name: Test Postfix integration
	run: \|
	postmap -q test@otherdomain.com socketmap:unix:/var/spool/postfix/srs:forward \| tee /tmp/srs-alias.txt
	postmap -q "$(cat /tmp/srs-alias.txt)" socketmap:unix:/var/spool/postfix/srs:reverse

Provide feedback