After this PR: http://www.freebsd.org/cgi/query-pr.cgi?pr=96807 security.jail.list sysctl description was added to jail(8). but in this commit: http://svn.freebsd.org/changeset/base/192896 this text was deleted (probably accidentally). Please return security.jail.list description to jail(8) man page. -- Anton Yuzhaninov