[2.0][Router] Improved ApacheMatcher performance

Bug fix: yes
Feature addition: no
Backwards compatibility break: yes - by currently removing the fallback matching
Symfony2 tests pass: yes
Fixes the following tickets: #5538
Todo: make the documentation PR if the patch works for 2.0 branch
License of the code: MIT
Documentation PR: ~


Hi, by adding the following option in ``` config_prod.yml ``` ```router.options.matcher.needs_collection: true``` this patch should start working again (the rest of the config params still apply)
As I don't have any project on 2.0 I couldn't test this properly but I'll try downloading 2.0.X and check it there soon.