APR: Change apr_connect() to take apr_sockaddr_t instead of hostname.

Add generic apr_create_socket().  Add apr_getaddrinfo() for doing
hostname resolution/address string parsing and building
apr_sockaddr_t.
Submitted by:	David Reid
Reviewed by:	Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86990 13f79535-47bb-0310-9956-ffa450edef68