[Minor] Add delayed condition method

src/libserver/symcache/symcache_c.cxx

@@ -82,4 +82,15 @@ rspamd_symcache_set_peak_callback (struct rspamd_symcache *cache, gint cbref)
 	auto *real_cache = C_API_SYMCACHE(cache);
 
 	real_cache->set_peak_cb(cbref);
+}
+
+gboolean
+rspamd_symcache_add_condition_delayed (struct rspamd_symcache *cache,
+									   const gchar *sym, lua_State *L, gint cbref)
+{
+	auto *real_cache = C_API_SYMCACHE(cache);
+
+	real_cache->add_delayed_condition(sym, cbref);
+
+	return TRUE;
 }

src/libserver/symcache/symcache_impl.cxx

@@ -646,6 +646,10 @@ auto symcache::set_peak_cb(int cbref) -> void
 	msg_info_cache("registered peak callback");
 }
 
+auto symcache::add_delayed_condition(std::string_view sym, int cbref) -> void
+{
+	delayed_conditions->emplace_back(sym, cbref, (lua_State *)cfg->lua_state);
+}
 
 auto cache_item::get_parent(const symcache &cache) const -> const cache_item *
 {

src/libserver/symcache/symcache_internal.hxx

@@ -345,6 +345,9 @@ struct delayed_cache_condition {
 	std::string sym;
 	int cbref;
 	lua_State *L;
+public:
+	delayed_cache_condition(std::string_view _sym, int _cbref, lua_State *_L) :
+		sym(_sym), cbref(_cbref), L(_L) {}
 };
 
 class symcache {
@@ -499,6 +502,13 @@ public:
 	 * @param cbref
 	 */
 	auto set_peak_cb(int cbref) -> void;
+
+	/**
+	 * Add a delayed condition for a symbol that might not be registered yet
+	 * @param sym
+	 * @param cbref
+	 */
+	auto add_delayed_condition(std::string_view sym, int cbref) -> void;
 };
 
 /*