Log module conflicts at the ERROR level

This makes it more obvious as to why a module failed to load during
startup, as DEBUG (the previous level) isn't normally displayed.

Author: dwfreed

include/module.h

@@ -131,7 +131,7 @@ E bool module_request(const char *name);
 #define MODULE_CONFLICT(self, modname) \
 	if (module_find_published(modname))					\
 	{									\
-		slog(LG_DEBUG, "module %s conflicts with %s, unloading",	\
+		slog(LG_ERROR, "module %s conflicts with %s, unloading",	\
 		     self->name, modname);					\
 		(self)->mflags = MODTYPE_FAIL;					\
 		return;								\