* modules/mappers/config9.m4: Substitute INSTALL_DSO as "yes" if

mod_so is linked in, or "no" otherwise.

* build/special.mk: Remove hack to guess whether mod_so is linked in
based on BUILTIN_LIBS; rely on INSTALL_DSO definition from
config_vars.mk.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@189603 13f79535-47bb-0310-9956-ffa450edef68