Implicit (third) +1, backport trivial fix for missing unistd.h
  rev 1.19 of mod_log_forensic

Contributor: Gunter
Verified by: trawick, nd, wrowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@103666 13f79535-47bb-0310-9956-ffa450edef68