Ref T150, utility functions in URL list

* renamed to withAppendedPath
* findByHost
* addFailed utility functions

src/blackmisc/stringutils.cpp

@@ -290,6 +290,12 @@ namespace BlackMisc
     {
         return input.replace('.', QLocale::system().decimalPoint());
     }
+
+    bool stringCompare(const QString &c1, const QString &c2, Qt::CaseSensitivity cs)
+    {
+        if (cs == Qt::CaseSensitive) { return c1 == c2; }
+        return caseInsensitiveStringCompare(c1, c2);
+    }
 }
 
 //! \endcond