Fix ndbm.h include problems with brain-dead glibc >= 2.1 which has ndbm.h in a

non-standard db1/ subdir. We fixed it by explicitly including <db1/ndbm.h>
instead of <ndbm.h> because adding -I/usr/include/db1 isn't really correct
(because it isn't guaranteed that the glibc includes are really under
/usr/include).

Submitted by: Henri Gomez <gomez@slib.fr>
Cleaned up and corrected by: Ralf S. Engelschall
PR: 4469, 4431, 4528


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83313 13f79535-47bb-0310-9956-ffa450edef68