updated PHP Doc Block

Update some PHP Doc Block for better IDE completetion
No, this library used four spaces. Please use this convention instead.  —
Brent Shaffer

On Tue, Jul 1, 2014 at 2:00 PM, Sum <notifications@github.com> wrote:

>> -     *   'allow_public_clients'  => true              // if true, "public clients" (clients without a secret) may be authenticated
>> -     * );
>> -     * @endcode
>> -     */
>> +	/**
>> +	 * @param \OAuth2\Storage\ClientCredentialsInterface $storage
>> +	 * @param array                                      $config
>> +	 * OPTIONAL Configuration options for the server
>> +	 * @internal param \OAuth2\Storage\ClientCredentialsInterface $clientStorage REQUIRED Storage class for retrieving client credentials information* REQUIRED Storage class for retrieving client credentials information
>> +	 * @code
>> +	 * $config = array(
>> +	 *   'allow_credentials_in_request_body' => true, // whether to look for credentials in the POST body in addition to the Authorize HTTP Header
>> +	 *   'allow_public_clients'  => true              // if true, "public clients" (clients without a secret) may be authenticated
>> +	 * );
>> +	 * @endcode
>> +	 */
> I converted the spaces to tabs which is better, i thought
> ---
> Reply to this email directly or view it on GitHub:
> https://github.com/bshaffer/oauth2-server-php/pull/405/files#r14425928