Refer to module by suitable file name (mod_*.c).
Test for mod_authz_core.c (instead of mod_authz_host.c) to properly
detect Apache 2.4 and avoid false positive for Apache 2.2.
Before this patch with a .htaccess file on a higher level in the
hierarchy with "Satisfy Any" it has been possible that the directory
protection didn't work as expected.
Alexander Achenbach