Error on exporting chat history when chat room contains "/"

[fmors]

I've had problems when exporting chat history of rooms that contain a / in their names on Linux. At least in my case, it wasn't escaping the / character properly.

Locally, I just did a replace of / with _. Worked pretty fine, but this is simply a workaround that works for me, but may not be the intended solution in terms of project design.

[r1bnc]

From what I've heard this project is being rewritten see #30.