Clean up the declarations and comments of some of the variables in

ap_get_client_block.
There were two len_read vars (each of different types), so the outer one
was shadowed - move it to the correct scope.
Move apr_bucket* old declaration inside of the loop so it is obvious
what its scope is.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91806 13f79535-47bb-0310-9956-ffa450edef68