Build symbol import and export files for

proxy on Netware using the same awk script
which is already used for mod_cache.

Adjust other Netware makefiles to use this
new imp file.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1728574 13f79535-47bb-0310-9956-ffa450edef68