Get the ap_config.h cleanup working on FreeBSD by adding includes of

additional system headers.

A platform check in logresolve.c to determine whether or not we include
<arpa/inet.h> was converted to a feature check.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85567 13f79535-47bb-0310-9956-ffa450edef68