Cleanup lints identified by eslint

Some files were omitted in the .eslintignore, left as an exercise to the
reader.

We probably want to reduce amount of globals overall and use proper es
modules.

proxy/util.js

@@ -1,3 +1,6 @@
+/* global log */
+/* exported Query, Params, DummyRateLimit */
+
 /*
 A JavaScript WebRTC snowflake proxy
 
@@ -34,7 +37,7 @@ class Util {
     return typeof PeerConnection === 'function';
   }
 
-};
+}
 
 // It would not be effective for Tor Browser users to run the proxy.
 // Do we seem to be running in Tor Browser? Check the user-agent string and for
@@ -99,7 +102,7 @@ class Query {
     return parts.join('&');
   }
 
-};
+}
 
 
 class Parse {
@@ -203,7 +206,7 @@ class Parse {
     }
   }
 
-};
+}
 
 
 class Params {
@@ -257,7 +260,7 @@ class Params {
     return val;
   }
 
-};
+}
 
 
 class BucketRateLimit {
@@ -295,7 +298,7 @@ class BucketRateLimit {
     return this.amount > this.capacity;
   }
 
-};
+}
 
 BucketRateLimit.prototype.amount = 0.0;
 
@@ -310,7 +313,7 @@ class DummyRateLimit {
     this.time = time;
   }
 
-  update(n) {
+  update() {
     return true;
   }
 
@@ -322,4 +325,4 @@ class DummyRateLimit {
     return false;
   }
 
-};
+}