These changes allow the support programs to compile on BeOS.

The biggest change is in ab.c where the functions that BeOS needs that
aren't the standard format are hidden behind a new ab_* define.  Tested
on FreeBSD and BeOS.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83964 13f79535-47bb-0310-9956-ffa450edef68