fetchSortedMatrixServers$ has a hand rolled parser for YAML

[hackaugusto]

Just like the python client (raiden-network/raiden#6424) the light client has a hand rolled parser:

light-client/raiden-ts/src/transport/epics/init.ts

Lines 154 to 164 in 5b3bfb9

	function yamlListToArray(yml: string): string[] {
	// match all strings starting with optional spaces followed by a dash + space
	// capturing only the content of the list item, trimming spaces
	const reg = /^\s*-\s*(.+?)\s*$/gm;
	const results: string[] = [];
	let match: RegExpExecArray | null;
	while ((match = reg.exec(yml))) {
	results.push(match[1]);
	}
	return results;
	}

The fix should be synchronized among both implementations.

[palango]

After the synapse update this information is now json encoded: https://raw.githubusercontent.com/raiden-network/raiden-service-bundle/master/known_servers/known_servers-production-v1.2.0.json

{
    "active_servers": [
        "transport.mainnet.raiden.anyblock.tools"
    ],
    "all_servers": [
        "transport.mainnet.raiden.anyblock.tools",
        "transport.raiden.dappnode.io",
        "transport.raiden.badgateway.tech",
        "transport.raiden.overdoze.se"
    ]
}

@christianbrb Do we need to update some environment for those changes?