The www/rubygem-passenger port should no longer depend on devel/rubygem-fastthread or devel/rubygem-daemon_controller. The passenger gem removed the fastthread dependency in version 4.0 and the daemon_controller dependency in version 5.0. https://rubygems.org/gems/passenger can be used to see the current dependencies.
A commit references this bug: Author: osa Date: Tue Sep 8 22:14:34 UTC 2015 New revision: 396443 URL: https://svnweb.freebsd.org/changeset/ports/396443 Log: Remove needless dependences. Bump PORTREVISION. PR: 202979 Changes: head/www/rubygem-passenger/Makefile
Thanks for report.