ipsec_strerror(3) on Linux
The text e8ee84d4b08c, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it. The page shows this text now.
error messages for the IPsec policy manipulation library