* Fix panic in BasicAuthDecode
If the string does not contain ":" that function would run into an
`index out of range [1] with length 1` error. prevent that.
* Update BasicAuthDecode()
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: zeripath <art27@cantab.net>