get_matrix_servers has a hand rolled parser for YAML

[hackaugusto]

raiden/raiden/utils/cli.py

Lines 441 to 449 in 9bd24b1

	available_servers = []
	for line in response.text.splitlines():
	line = line.strip(string.whitespace + "-")
	if line.startswith("#") or not line:
	continue
	if not line.startswith("http"):
	line = "https://" + line # default schema
	available_servers.append(line)
	return available_servers

Using a hand rolled parser can be very buggy and most likely will lead to differences across clients. It seems pyyaml is not a dependency anymore, so json would be a better file format since it is used extensively on both clients.