markdown markup characters in irc nicknames are not escaped when bridged to discord

[illwieckz]

Which version of matterbridge are you using?

version: 0.12.1-dev

Please describe the expected behavior.

Using characters known to be markdown control characters in irc nickname must not be parsed as markdown control character by discord.

Please describe the actual behavior.

Using a character known to be a markdown control character in irc nickname makes discord parsing the nickname.

Any steps to reproduce the behavior?

Join an irc channel bridged to a discord one, and use this nickname:

`test

Then types this message in irc channel:

this is code`

You get that on discord side:

<test> this is code

You must get that:

<`test> this is code

I guess any character known to be a markdown markup one must be escaped when found in irc nickname prior to be sent to discord.

[42wim]

Fixed this by adding a new StripNick parameter, which strips every non-alphanumerical character.