refactor: Change LogPrintLevel order to category, severity

This is more consistent with the other functions, as well as with the
logging output itself. If we want to make this change, we should do it
before it's all over the place.

src/httpserver.cpp

@@ -359,7 +359,7 @@ static void libevent_log_cb(int severity, const char *msg)
         level = BCLog::Level::Error;
         break;
     }
-    LogPrintLevel(level, BCLog::LIBEVENT, "%s\n", msg);
+    LogPrintLevel(BCLog::LIBEVENT, level, "%s\n", msg);
 }
 
 bool InitHTTPServer()