Whitelist the tel: and fax: URL protocols.

[markjaquith]

We should support telephone and fax number URLs, by whitelisting their protocols: tel: and fax:

​http://www.ietf.org/rfc/rfc2806.txt

e.g.

tel:2025551234

[ocean90]

I thought we had added the filter for adding more protocols, see #18268.

[markjaquith]

We added a filter. Doesn't mean we shouldn't add some more defaults. Telephone links are particularly handy for local businesses creating mobile sites.

[nacin]

You have +1 from me.

[markjaquith]

.2 patch makes the edit_user() call use wp_allowed_protocols(), so there are no other places to keep having to update this protocol list.

[markjaquith]

In [21170]:

Allow tel: and fax: protocols. Wrangle the last hardcoded protocol enumeration so that it uses wp_allowed_protocols(). fixes #21081

[ocean90]

Replying to markjaquith:

We added a filter. Doesn't mean we shouldn't add some more defaults. Telephone links are particularly handy for local businesses creating mobile sites.

Yeah, of course. I just saw the changed line in wp-admin/includes/user.php which doesn't used wp_allowed_protocols. But now it does and I'm happy.