ext/filter support for validating MAC addresses.
There is no need to use memchr() for comparisons in these places.
Add option to specific the expected separator character.
Merge branch 'PHP-5.5'

* PHP-5.5:
  Add option to specific the expected separator character.
  There is no need to use memchr() for comparisons in these places.
  ext/filter support for validating MAC addresses.