qjail2-2.2_1 only supports RELEASES 8.x and 9.X. Those releases are officially past End Of Life. So please remove this port from the ports system.
A commit references this bug: Author: dbaio Date: Sun Nov 26 18:28:55 UTC 2017 New revision: 454914 URL: https://svnweb.freebsd.org/changeset/ports/454914 Log: Remove sysutils/qjail2, this port is only for FreeBSD 8 and 9 (EoL) PR: 223885 Submitted by: Joe Barbish <qjail1@a1poweruser.com> (maintainer) Changes: head/MOVED head/sysutils/Makefile head/sysutils/qjail2/
Removed, thank you!
Joe, it occurs to me that sysutils/qjail and sysutils/qjail4 should have CONFLICTS_INSTALL for each other.