move closer to IPv6 support by changing the server_addr_rec

move closer to IPv6 support by changing the server_addr_rec
representation of the bound address to something which handles
IPv6; this also allows us to switch to APR resolver routines
in places instead of calling gethostbyname() and gethostbyaddr()
directly

Issues remaining with this set of changes:

1) apr_snprintf()'s %pA formatting needs to change to take
   apr_sockaddr_t * instead of sockaddr_in * -OR- just get rid
   of that type of formatting
2) apr_get_inaddr() is no longer used and should be removed

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87363 13f79535-47bb-0310-9956-ffa450edef68