Fix the types of the variables passed as the len parm to bucket->read()

(in various places).
In ab, change the declaration of argv so that it can be passed into
apr_initopt() without warning.
Submitted by:	Victor J. Orlikowski <v.j.orlikowski@gte.net>
Reviewed and modified slightly by:	Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86229 13f79535-47bb-0310-9956-ffa450edef68