All path rules require paths to be lowercase

[stevenbower]

All of the path routing rules call types.CanonicalDomain which trims space and lowercases but this means that any paths you'd like to route by must all be in lowercase as well.

[stevenbower]

Looks like this was broken as part of fixing #733

[stevenbower]

This changes the behavior of "path" based rules such that they continue to trim the path strings in the rules but not lowercase them. Not doing this leads to inconsistent behavior where you can define a rule (eg PathPrefix:/fooBar) but that rule will not will match a path that is the same (eg http://foo.com/fooBar will not match this rule). An alternative approach would be to change the path matching such that it downcases the incomping path prior to comparison but that seems overly broad and I suspect (but maybe I'm wrong) that the behavior add in #733 for Path based rules was not intended.