Fix: Unable to authenticate WAXLRS using "Basic" authentication method.

It seems that it was needed to replace the space character in "Basic " with "Basic%20" for the lunch url to work with WAXLRS.

Not sure if this implementation is according to the spec? (did not read it) Or it is a WAXLRS bug. Anyways, now it works :-)

BTW, I saw other LRSes (Rustici's public LRS) that do not use "Basic " and just send the base64_encode("username:password"). Weird :-)