Add irc password into config

[TROUVERIE Joachim]

Create an optional config key ircPass to send password at irc authentication.

[TeoTwawki]

Do you mean nick pass or channel pass?

I took a stab at both recently. Had partial success.

{
    "discordToken": "my_discord_token",
    "ircServer": "chat.freenode.org",
    "ircPort": "6667",
    "ircSSl": false,
    "ircNick": "torii",
    "nickPass": "password",
    "mappingChannels":
    {
        "discord_chan": "#irc_chan"
    },
    "ircKeys":
    {
        "#irc_chan": "password"
    },
    "commandChars": ["~", "!"]
}

[TROUVERIE Joachim]

I was talking about nickPass but eventually I could include channel pass as well.
How about you create a new issue with it if you feel to implement it ?