Separate SASL password and server PASS password options

[usrbinsam]

node-irc/lib/irc.js

Lines 756 to 762 in 2a5f46d

	// SASL, server password
	if (this.opt.sasl) {
	// see http://ircv3.net/specs/extensions/sasl-3.1.html
	this.send('CAP', 'REQ', 'sasl');
	} else if (this.opt.password) {
	this.send('PASS', this.opt.password);
	}

In some cases, it's useful to connect with a server password and a SASL password, so it might be useful to have a separate config option for SASL password and server password since they're not necessarily mutually exclusive.

My use case is using the server password to authenticate an I:Line/Auth Block, alongside normal SASL Plain services authentication.