Merge pull request #7419 from Abijeet/feature-7175

.htaccess

lib/private/DB/Connection.php

...e/DB/QueryBuilder/ExpressionBuilder/ExpressionBuilder.php

...QueryBuilder/ExpressionBuilder/MySqlExpressionBuilder.php

...ueryBuilder/ExpressionBuilder/SqliteExpressionBuilder.php

...ivate/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php

lib/private/DB/QueryBuilder/QueryBuilder.php

lib/private/User/Database.php

lib/public/DB/QueryBuilder/IFunctionBuilder.php

tests/lib/DB/QueryBuilder/ExpressionBuilderTest.php

tests/lib/DB/QueryBuilder/FunctionBuilderTest.php

tests/lib/User/Backend.php

tests/lib/User/DatabaseTest.php