http: allow for customized routes

Update to allow arrays of routes to be passed to the http frontend.
This also supports named parameters as permitted by the
router.

To avoid external dependencies in the middleware, a RouteParam and
RouteParams type was added to the bittorrent package.

Note: this eliminates the need for "enable_legacy_php_urls", as
the the additional route could be added to the route array. However,
this may be considered a breaking change.

dist/example_config.yaml

@@ -41,15 +41,25 @@ chihaya:
     # Disabling this should increase performance/decrease load.
     enable_request_timing: false
 
-    # Whether to listen on /announce.php and /scrape.php in addition to their
-    # non-.php counterparts.
-    # This is an option for compatibility with (very) old clients or otherwise
-    # outdated systems.
-    # This might be useful to retracker.local users, for more information see
-    # http://rutracker.wiki/Оптимизация_обмена_битторрент_траффиком_в_локальных_сетях
-    # and
-    # http://rutracker.wiki/Retracker.local
-    enable_legacy_php_urls: false
+    # An array of routes to listen on for announce requests. This is an option
+    # to support trackers that do not listen for /announce or need to listen
+    # on multiple routes.
+    #
+    # This supports named parameters and catch-all parameters as described at
+    # https://github.com/julienschmidt/httprouter#named-parameters
+    announce_routes:
+      - "/announce"
+      # - "/announce.php"
+
+    # An array of routes to listen on for scrape requests. This is an option
+    # to support trackers that do not listen for /scrape or need to listen
+    # on multiple routes.
+    #
+    # This supports named parameters and catch-all parameters as described at
+    # https://github.com/julienschmidt/httprouter#named-parameters
+    scrape_routes:
+      - "/scrape"
+      # - "/scrape.php"
 
     # When enabled, the IP address used to connect to the tracker will not
     # override the value clients advertise as their IP address.