use NULL to load plugins from default plugin directory

src/pki/Makefile.am

@@ -7,6 +7,5 @@ pki_SOURCES = pki.c pki.h command.c command.h \
 pki_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la
 INCLUDES = -I$(top_srcdir)/src/libstrongswan
 AM_CFLAGS = \
-	-DPLUGINDIR=\"${plugindir}\" \
 	-DPLUGINS=\""${libstrongswan_plugins}\"" \
 	-DSTRONGSWAN_CONF=\"${strongswan_conf}\"

src/pki/pki.c

@@ -89,7 +89,7 @@ int main(int argc, char *argv[])
 		fprintf(stderr, "integrity check of pki failed\n");
 		exit(SS_RC_DAEMON_INTEGRITY);
 	}
-	if (!lib->plugins->load(lib->plugins, PLUGINDIR,
+	if (!lib->plugins->load(lib->plugins, NULL,
 			lib->settings->get_str(lib->settings, "pki.load", PLUGINS)))
 	{
 		exit(SS_RC_INITIALIZATION_FAILED);