make more cdn's and API urls/settings configurable

* CDNs for OCI, NSI, etc.
* OSM API (URL and oauth API settings)
* taginfo API
* nominatim API

index.html

@@ -43,17 +43,6 @@
         } else {
           var context = iD.coreContext()
             .assetPath('dist/')
-            .apiConnections([
-              {
-                url: 'https://www.openstreetmap.org',
-                client_id: '0tmNTmd0Jo1dQp4AUmMBLtGiD9YpMuXzHefitcuVStc',
-                client_secret: 'BTlNrNxIPitHdL4sP2clHw5KLoee9aKkA7dQbc0Bj7Q'
-              }, {
-                url: 'https://api06.dev.openstreetmap.org',
-                client_id: 'Ee1wWJ6UlpERbF6BfTNOpwn0R8k_06mvMXdDUkeHMgw',
-                client_secret: 'OnfWFC-JkZNHyYdr_viNn_h_RTZXRslKcUxllOXqf5g'
-              }
-            ])
             .containerNode(container);
           window.context = window.id = context;  // for debugging
           context.init();