refactor(proto): a few logging and comment tweaks (#494)

Mostly just to split off irrelevant changes from #444.

noq-proto/src/connection/mod.rs

@@ -664,6 +664,8 @@ impl Connection {
             }
         }
 
+        trace!(%path_id, ?reason, "closing path");
+
         // Send PATH_ABANDON
         self.spaces[SpaceId::Data]
             .pending
@@ -986,8 +988,8 @@ impl Connection {
                 return None;
             }
             StateType::Draining | StateType::Closed => {
-                // self.close is only reset once the associated packet had been
-                // encoded successfully
+                // self.connection_close_pending is only reset once the associated packet
+                // had been encoded successfully
                 if !self.connection_close_pending {
                     self.app_limited = true;
                     return None;