raise log level on dlerror(), fixes #1734, thanks @James-TR

Author: Peter van Dijk

pdns/ueberbackend.cc

@@ -73,7 +73,7 @@ bool UeberBackend::loadmodule(const string &name)
   void *dlib=dlopen(name.c_str(), RTLD_NOW);
 
   if(dlib == NULL) {
-    L<<Logger::Warning <<"Unable to load module '"<<name<<"': "<<dlerror() << endl; 
+    L<<Logger::Error<<"Unable to load module '"<<name<<"': "<<dlerror() << endl;
     if(name.find("gsqlite3")!=string::npos)
       L<<Logger::Warning <<"Trying to load gsqlite3backend? Make sure pdns_server was compiled with sqlite3!" <<endl;
     return false;