Recent changes to /usr/ports/Mk breaks /usr/ports/ports-mgmt/p5-FreeBSD-Portindex

[Manfred Antar]

The changes to port Mk files breaks /usr/ports/ports-mgmt/p5-FreeBSD-Portindex:

When doing cache-init I get this:

Processing make describe output for path "/usr/ports": Can't locate object method "mark_used_by" via package "FreeBSD::Portindex::Category" at /usr/local/lib/perl5/site_perl/FreeBSD/Portindex/Tree.pm line 431.

portindex worked fine till the changes