*) Put lib/aputil/ into the INCLUDES path

*) add a Makefile.in to test/ to help with building test programs (these are
   not part of the build; just manual compiles right now)
*) add test/dbu.c as a quick test of apu_dbm
   [ dbu.c originally came from the SDBM package ]


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87082 13f79535-47bb-0310-9956-ffa450edef68