Remove recent new marker macroPROXY_HOOK_NON_LINKED and instead use PROXY_DECLARE_OPTIONAL_HOOK which is defined to be equal to APR_DECLARE_EXTERNAL_HOOK. Correct explanation for the use of PROXY_DECLARE_OPTIONAL_HOOK. Use PROXY_DECLARE_OPTIONAL_HOOK for the correct hooks. Adjust build/make_nw_export.awk to match the new PROXY_DECLARE_OPTIONAL_HOOK.
httpd/httpd/trunk/build/make_nw_export.awk
httpd/httpd/trunk/modules/proxy/mod_proxy.h