Libreswan and Heartbleed

Is Libreswan vulnerable to the OpenSSL "Heartbleed" exploit?

Libreswan is an implementation of the IPsec IKEv1 and IKEv2 keying protocols. Unlike some open source VPN products which are based on TLS/SSL protocols, IPsec implementations are not vulnerable to openssl vulnerability CVE-2014-0160, also known as Heartbleed.