Leave URL parameters unmodified when lowercasing URLs

[jimlambie]

The configuration property rewrites.forceLowerCase, when true, is modifying URL parameters rather than the path of the URL.

e.g.

http://www.somedomain.tech/a-url-with-CAPITALS?ga=WEdfjjjjERTHHH should be rewritten as http://www.somedomain.tech/a-url-with-capitals?ga=WEdfjjjjERTHHH... not http://www.somedomain.tech/a-url-with-capitals?ga=wedfjjjjerthhh