* misc fixes:
- ensure SCRIPT_NAME is never empty, fixes#466
- static: if ending in '/' look for '/index.html'
- tests: use local httpbin instead of iana.org tests
- docker: switch to $VOLUME_DIR before initing collection
- ensure static_prefix is set correctly after host prefix
- bump version to 2.3.2.dev0
* rules update: fix fuzzy matching, rewriting rules for soundcloud