[PEPr] Comment on HTTP::HTTP_OAuthProvider

I think sharing HTTP_OAuth is best. But, it is difficult to improve. I give priority to implementing RSA-SHA1. To implementing RSA-SHA1, existing code cannot be made the best use of for extensive modifications are necessary. For instance, it is necessary to change HTTP/OAuth/Provider/Request.php and HTTP/OAuth/Signature/*. There is a possibility that the usage of an existing method changes, and confusion might be given to the user. So, I propose HTTP_OAuthProvider. Yoshida -- http://pear.php.net/pepr/pepr-proposal-show.php?id=644