Warn about manual plugin load directives for pluto/charon with --disable-load-warning compile option

src/starter/Makefile.am

@@ -39,6 +39,10 @@ if USE_CHARON
   AM_CFLAGS += -DSTART_CHARON
 endif
 
+if USE_LOAD_WARNING
+  AM_CFLAGS += -DLOAD_WARNING
+endif
+
 ipsec.conf.5:	ipsec.conf.5.in
 		sed \
 		-e "s:@IPSEC_VERSION@:$(PACKAGE_VERSION):" \

src/starter/starter.c

@@ -241,6 +241,7 @@ int main (int argc, char **argv)
 	time_t last_reload;
 	bool no_fork = FALSE;
 	bool attach_gdb = FALSE;
+	bool load_warning = FALSE;
 
 	/* global variables defined in log.h */
 	log_to_stderr = TRUE;
@@ -300,6 +301,21 @@ int main (int argc, char **argv)
 
 	plog("Starting strongSwan "VERSION" IPsec [starter]...");
 
+#ifdef LOAD_WARNING
+	load_warning = TRUE;
+#endif
+
+	if (lib->settings->get_bool(lib->settings, "starter.load_warning", load_warning))
+	{
+		if (lib->settings->get_str(lib->settings, "charon.load", NULL) ||
+			lib->settings->get_str(lib->settings, "pluto.load", NULL))
+		{
+			plog("!! Your strongswan.conf contains manual plugin load options for");
+			plog("!! pluto and/or charon. This is recommended for experts only, see");
+			plog("!! http://wiki.strongswan.org/projects/strongswan/wiki/PluginLoad");
+		}
+	}
+
 	/* verify that we can start */
 	if (getuid() != 0)
 	{