Merge r1728804 from trunk:

Add mod_proxy_hcheck to the Netware build
system.

Contributed by NormW.

Submitted by: rjung


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1766906 13f79535-47bb-0310-9956-ffa450edef68