use NULL to load plugins from default plugin directory

src/openac/Makefile.am

@@ -6,7 +6,6 @@ INCLUDES = -I$(top_srcdir)/src/libstrongswan
 AM_CFLAGS = \
   -DIPSEC_CONFDIR=\"${sysconfdir}\" \
   -DSTRONGSWAN_CONF=\"${strongswan_conf}\" \
-  -DIPSEC_PLUGINDIR=\"${plugindir}\" \
   -DPLUGINS=\""${libstrongswan_plugins}\""
 openac_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la
 

src/openac/openac.c

@@ -231,7 +231,7 @@ int main(int argc, char **argv)
 		fprintf(stderr, "integrity check of openac failed\n");
 		exit(SS_RC_DAEMON_INTEGRITY);
 	}
-	if (!lib->plugins->load(lib->plugins, IPSEC_PLUGINDIR,
+	if (!lib->plugins->load(lib->plugins, NULL,
 			lib->settings->get_str(lib->settings, "openac.load", PLUGINS)))
 	{
 		exit(SS_RC_INITIALIZATION_FAILED);