Man pages at https://man.freebsd.org generate broken links for items that have underscores embedded in their names (CMSG_DATA, if_ipsec, ipsec_strerror, all Netgraph pages of ng_* and so on). For example: https://man.freebsd.org/cgi/man.cgi?query=ipsec&sektion=4&format=html has broken link to ipsec_set_policy(3) The actual link is to https://man.freebsd.org/cgi/man.cgi?query=policy&sektion=3&apropos=0&manpath=FreeBSD+14.0-RELEASE+and+Ports , that is to the part of the name that is after the last "_". The expected link is be to the https://man.freebsd.org/cgi/man.cgi?query=ipsec_set_policy&sektion=3&apropos=0&manpath=FreeBSD+14.0-RELEASE+and+Ports The bug also manifests visually, with only part of the name underscored/linkified, both in "SEE ALSO" section and for links within the man body.
*** Bug 275771 has been marked as a duplicate of this bug. ***
Duplicate of https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275000