The eclass is barely used, unmaintained and not really useful for any modern EAPI. Time to kill it with fire.
commit a2baa78f261046f963c19a851c6343d9d3f653df (HEAD -> master, origin/master, origin/HEAD) Author: Michał Górny <mgorny@gentoo.org> AuthorDate: Fri Jun 30 13:25:36 2017 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: Fri Jun 30 13:29:58 2017 confutils.eclass: Mark @DEAD for removal
commit 992fa0e97367eac8a93db3f7c939285b49175d62 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: Sun Jul 30 23:12:53 2017 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: Sun Jul 30 23:13:40 2017 confutils.eclass: Remove last rited eclass