CA cert loading logs failing certs

src/verify.rs

@@ -95,10 +95,17 @@ impl RootCertStore {
     for der in ders {
       match self.add(&der) {
         Ok(_) => valid_count += 1,
-        Err(_) => invalid_count += 1
+        Err(err) => {
+          debug!("invalid cert der {:?}", der);
+          info!("certificate parsing failed: {:?}", err);
+          invalid_count += 1
+        }
       }
     }
 
+    info!("add_pem_file processed {} valid and {} invalid certs",
+          valid_count, invalid_count);
+
     Ok((valid_count, invalid_count))
   }
 }