remove stale entries #127

	name: Hosts Validation

	on:
	push:
	paths:
	- hosts.txt
	pull_request:
	paths:
	- hosts.txt

	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Validate hosts file
	run: \|
	input="hosts.txt"
	debug=false
	while IFS= read -r line
	do
	if [[ "$line" =~ ^\# ]]; then
	$debug && echo "$line is a comment"
	elif [[ "$line" = "" ]]; then
	$debug && echo "line is empty"
	elif [[ "$line" =~ ^127\.0\.0\.1 ]] \|\| [[ "$line" =~ ^::1 ]]; then
	$debug && echo "$line is an allowed redirection"
	else
	echo "$line is not an allowed redirection"
	echo "Only redirection to the loopback interface is allowed (127.0.0.1 for IPv4 or ::1 for IPv6)"
	exit 1
	fi
	done < "$input"
	echo "Hosts file is valid"

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