avoid joining multiple times on the same interface for ipv4 #166

	name: Integration Test (Python zeroconf)

	on: [push, pull_request]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1

	- name: Install our MSRV
	uses: dtolnay/rust-toolchain@stable
	with:
	toolchain: "1.70"

	- name: Compile example
	run: cargo build --example register

	- name: Install dependencies
	run: \|
	sudo apt-get -y install python3-setuptools python3-wheel
	pip3 install --user zeroconf

	- name: Test zeroconf
	run: \|
	timeout 5 cargo run --example register &
	python3 examples/zeroconf_test.py

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