manual: Add paragraph about new scoped_connection #2

	name: "Meson: gcc"

	on: [push]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1
	- name: Build
	run: \|
	# Prevent blocking apt install on a question during configuring of tzdata.
	export ENV DEBIAN_FRONTEND=noninteractive
	sudo apt update
	sudo apt install libxml2-utils docbook5-xml docbook-xsl mm-common g++ meson ninja-build python3-setuptools --yes
	export CXX=g++
	meson setup -Dwarnings=fatal -Dwarning_level=3 -Dwerror=true _build
	cd _build
	meson compile
	- name: Test
	run: \|
	cd _build
	meson test
	- name: Dist
	run: \|
	sudo apt install git --yes
	# dist runs setup again so we need to specify CXX again.
	export CXX=g++
	cd _build
	meson dist

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