Allow urls with missing query param values

allow urls such as http://youtu.be/26dBZ7DPglE?a (pattern used by a lot of url shorteners)

Author: jloomis

src/main/java/com/ning/http/client/RequestBuilderBase.java

@@ -275,9 +275,10 @@ private String buildUrl(String url) {
  for( String query : queries) {
  pos = query.indexOf("=");
  if (pos <= 0) {
- throw new IllegalStateException("Illegal URL: " + url);
+ addQueryParameter(query, null);
+ }else{
+ addQueryParameter(query.substring(0, pos) , query.substring(pos +1));
  }
- addQueryParameter(query.substring(0, pos) , query.substring(pos +1));
  }
  }
  return buildedUrl.toString();