avoid creating an empty mbuf in esp_cbc_encrypt/esp_cbc_decrypt(). From FreeBSD by Bill Fenner (4.5 years ago!)
avoid creating an empty mbuf in esp_cbc_encrypt/esp_cbc_decrypt().
From FreeBSD by Bill Fenner (4.5 years ago!)

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame