unhandled event in journalctl

[CryptoSiD]

Hi,

I'm getting the following error every hour or so in the journalctl log:

discord_parse_message: unhandled event: MESSAGE_DELETE_BULK

[sm00th]

Those are leftover debug messages to keep track old/catch new discord events. But at this point it makes no sense to make everyone see them, so starting with 549b05a6c31cbac6628229601567f2054b65eab2 you won't see them without BITLBEE_DEBUG env var set. That commit also moves a couple of leftover errors from g_print to imcb_error.