feat: complete basic functions

Support http,dns and mysql connection. Support custom http, dns response. Support dns rebinding.
Support mysql load local files and jdbc deserialize exploit.

pkg/mysql/config.go

@@ -0,0 +1,7 @@
+package mysql
+
+type Config struct {
+	Enable bool
+	Addr string
+	VersionString string `yaml:"version_string"`
+}