Also, a bug in checking the OAuth callback URL for validity was fixed,
where it referenced the wrong variable when going through form data.

* superfluous whitespace remove
* minor L10n and i18n updates

L10n updates
Remove superfluous whitespace
Number parameters in message when two or more are used
ClientException and ServerException should end with a period

* translator documentation added.
* superfluous whitespace removed.

URL and license image URL) when selecting private or allrightsreserved
licenses.

OpenID: add option to enable asking for a username to append to the trusted provider's base URL. Good for hooking up with sites like WikiHow, where usernames are appended to a base URL to get a profile URL which is used as the provider.

$config['openid']['append_username'] = true;
or check 'Append a username to base URL' in OpenID admin panel.

OpenID access control options: trusted provider URL, Launchpad team restrictions. Added an admin panel for setting these and OpenID-only mode, off by default.

To enable the admin panel:
    $config['admin']['panels'][] = 'openid';

Or to set them manually:
    $config['openid']['trusted_provider'] = 'https://login.ubuntu.net/';
    $config['openid']['required_team'] = 'my-project-cabal';
    $config['site']['openidonly'] = true;

OpenID-only mode can still be set from addPlugin() parameters as well for backwards compatibility.
Note: if it's set there, that value will override the setting from the database or config.php.

Note that team restrictions are only really meaningful if a trusted provider is set; otherwise,
any OpenID server could report back that users are members of the given team.

Restrictions are checked only at OpenID authentication time and will not kick off people currently
with a session open; existing remembered logins may also survive these changes.

Using code for Launchpad team support provided by Canonical under AGPLv3, pulled from r27 of
WordPress teams integration plugin:
    https://code.edge.launchpad.net/~canonical-isd-hackers/wordpress-teams-integration/trunk

* Add more translator documentation
Signed-off-by: Siebrand Mazeland <s.mazeland@xs4all.nl>

Incorrectly said this was for nudging, not subbing/unsubbing