Test that setRequestHeader properly checks for line feeds in header values.

a%0AEvil%3A%20on -> SUCCESS, setRequestHeader() raised an exception SyntaxError: The string did not match the expected pattern.

a%0DEvil%3A%20on -> SUCCESS, setRequestHeader() raised an exception SyntaxError: The string did not match the expected pattern.

a%0D%0AEvil%3A%20on -> SUCCESS, setRequestHeader() raised an exception SyntaxError: The string did not match the expected pattern.

a%0A%0DEvil%3A%20on -> SUCCESS, setRequestHeader() raised an exception SyntaxError: The string did not match the expected pattern.