Fix DateTime, when use it with D/l in format and textual day have dot at...

Fix DateTime, when use it with D/l in format and textual day have dot at the end

For example :

```php
$string = "Sun., Nov. 29, 2012 5:00PM";

$data = DateTime::createFromFormat( "D., M# j, Y g:iA", $string );

var_dump( $data );
var_dump( DateTime::getLastErrors() );
```

return

```
bool(false)
array(4) {
  'warning_count' =>
  int(0)
  'warnings' =>
  array(0) {
  }
  'error_count' =>
  int(2)
  'errors' =>
  array(2) {
    [0] =>
    string(32) "A textual day could not be found"
    [4] =>
    string(40) "The separation symbol could not be found"
  }
}
```

This fix add more stop characters ( from `#` )