ucspi-tcp6 is a fork of Dan Bernstein's ucspi-tcp 0.88, including: - rblsmtpd Greetdelay add-on and removal of the compiled-in default-RBL - Felix von Leitner's's IPv6 patch ucspi-tcp-0.88-ipv6.diff19.bz2 - Jens Wehrenbrecht's IPv4 CIDR extension - Li Minh Bui's IPv6 support for compactified IPv6 addresses and CIDR notation support