Remove bad `suppress_prefixlength` iproute2 rule #472

	name: Debug build

	on:
	push:
	branches:
	- main
	- dev
	paths-ignore:
	- '**.md'
	- '.github/**'
	- '!.github/workflows/debug.yml'
	pull_request:
	branches:
	- dev

	jobs:
	build:
	name: Debug build
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Get latest go version
	id: version
	run: \|
	echo ::set-output name=go_version::$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json \| grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' \| head -1 \| cut -d':' -f2 \| sed 's/ //g; s/"//g')
	- name: Setup Go
	uses: actions/setup-go@v2
	with:
	go-version: ${{ steps.version.outputs.go_version }}
	- name: Add cache to Go proxy
	run: \|
	version=`git rev-parse HEAD`
	mkdir build
	pushd build
	go mod init build
	go get -v github.com/sagernet/sing-tun@$version
	popd
	continue-on-error: true
	- name: Build
	run: \|
	go build -v .

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