Readline lib eats backslash characters

[rkervella]

The readline lib we're using in master prevents users to input \ characters. They don't get displayed but a non-printable character seems to be inserted instead.

[RafBishopFox]

@rkervella I think I identified the issue and submitted a PR upstream. I tested my fix with Sliver, and it seems to restore the behavior back to what we have in the current release version:

[rkervella]

Thanks I'll have a look today.