app-portage/repoman: version bump to 2.3.11

app-portage/repoman: version bump to 2.3.11

Support the new Gentoo Authors copyright policy and automatically apply
the new policy when updating copyright headers.  Earlier versions of
repoman will report an ebuild.badheader warning for the new copyright
headers. Users of earlier versions of repoman should be advised to
simply ignore the ebuild.badheader warning, or else upgrade to the
latest version of repoman.

Bug: https://bugs.gentoo.org/666330
Package-Manager: Portage-2.3.49, Repoman-2.3.11