Use apr_want.h to get the declarations for ntohs et al instead of

including the appropriate system header files directly.

This gets rid of a warning for props.c on FreeBSD 3.4 which cropped
up when I included the right header file to get OS/390 to build :)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88132 13f79535-47bb-0310-9956-ffa450edef68