pkg_upgrade perl update

[Dominic Fandrey]

If you run 'pkg_upgrade -a' and see the following message:

pkg_add: can't open dependency file '/var/db/pkg/perl-5.10.1/+REQUIRED_BY'!
dependency registration is incomplete
pkg_upgrade: Add dependency <perl-5.8.9_3> (lang/perl5.8).

Run
pkg_upgrade -C lang/perl5.10

to update to the right version of perl.