Taken from PR 199755 with minor modifications.
Proposed commit message:
new port: security/rubygem-omniauth-multipassword Ruby gem that implements an OmniAuth strategy that allows to authenticate against different password strategies at once. WWW: https://github.com/jgraichen/omniauth-multipassword PR: 199755 Submitted by: Torsten Zuehlsdorff <ports@toco-domains.de> Approved by: swills (mentor), mat (mentor)