LUD-16: Lightning Address

[chill117]

Add support for LUD-16 Lightning Address

Possible new server options:

{
	lightningAddress: {
		// Whether or not to accept payments to any user.
		// Setting this to FALSE will reject payments if a user was not found.
		catchAll: true,
		// Optionally define an array of users for which to accept payments.
		// "username" must be unique.
		users: [
			// { username: 'example' },
			// { username: 'another-user' },
		],
	},
}

[danielcharrua]

this issue is under development or something? Thx