[Palladian] URL Normalizer: Make certain changes optional via setting

Hi @danielesser,

the URL Normalizer sometimes make undesired normalizations liek adding a trialing slash.

Valid: https://kni.me/n/HqED49mBqBl-sfCF
In-Valid: http://kni.me/n/HqED49mBqBl-sfCF/

Whilst it’s mandatory to have a protocol and certain aspects of the syntax to be present for validity, I’d like to propose a few things:

1. Chose normalization protocol

2. Make trailing slash optional

3. Add option for lower case conversion

4. Add option to remove query parameters and / or anchors

Best

Mike