Add configs for common media types used for .woff

By default the configurations from this repository ensure that
`.woff` files are served with the `application/font-woff` media
type and with far future expires headers. However, not all users
use all the configurations provided by this project, or in some
cases, the headers are overwritten from the level "beneath" Apache
(e.g.: from `php`).

Looking at the results from the HTTP Archive¹ from 15.10.2014:

  +---+--------------------+---------------------------------+
  |   | number of requests |        media type               |
  +---+--------------------+---------------------------------+
  | 1 |              35320 | font/woff                       |
  | 2 |              22128 | application/x-font-woff         |
  | 3 |              19528 | application/octet-stream        |
  | 4 |              17648 | text/plain                      |
  | 5 |               9692 | application/font-woff           |
  |   |                ... |                             ... |
  | 8 |               2496 | font/x-woff                     |
  | 9 |               1804 | application/x-woff              |
  |   |                ... |                             ... |
  +---+--------------------+---------------------------------+

one can see that the `font/woff` and `application/x-font-woff`
media types are used way more often than the IANA registered²
`application/font-woff`.

Other incorrect/unofficial media types are also used, but their
usage is either wrong or low enough to not justify their addition.

Because of the things stated above, the changes from this
commit will ensure that Apache will serve anything labeled with
the `font/woff` or `application/font-woff` media type with far
future expires headers.

- - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - -

¹ https://www.igvita.com/2013/06/20/http-archive-bigquery-web-performance-answers/

  Query used:

    select count(requestid) as number_of_requests,
           mimetype as media_type
    from [httparchive:runs.2014_10_15_requests]
    where (lower(mimetype) contains "woff") or
          (
             regexp_match(lower(url), r'\.woff$') or
             regexp_match(lower(url), r'\.woff\?')
          )
    group by media_type
    order by number_of_requests desc;

² http://www.iana.org/assignments/media-types/application/font-woff