WebView: Don't try to load invalid one-word urls

And also save the host lookup in case of invalid url.

src/lib/webengine/webview.cpp

@@ -176,15 +176,18 @@ void WebView::load(const LoadRequest &request)
         !reqUrl.path().contains(QL1C(' ')) &&
         !reqUrl.path().contains(QL1C('.'))
        ) {
-        // FIXME: This is blocking...
+        QUrl u(QSL("http://") + reqUrl.path());
-        QHostInfo info = QHostInfo::fromName(reqUrl.path());
+        if (u.isValid()) {
+            // This is blocking...
+            QHostInfo info = QHostInfo::fromName(u.path());
             if (info.error() == QHostInfo::NoError) {
                 LoadRequest req = request;
-            req.setUrl(QUrl(QSL("http://") + reqUrl.path()));
+                req.setUrl(u);
                 loadRequest(req);
                 return;
             }
         }
+    }
 
     const LoadRequest searchRequest = mApp->searchEnginesManager()->searchResult(request.urlString());
     loadRequest(searchRequest);