Handle percent encoded characters

Passwords could be having special characters, in which case they need to
be percent encoded as per the RFC-3986 section 2.1. in the URL.

For such fields, where the password may be percent encoded, it also
needs to be decoded. That is what this change does. It takes the
password which may be percent encoded and provides with an ascii
equivalent string

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.com>