Fix pkgin detection on NetBSD 6 and 7 (#15834)
Fix pkgin detection on NetBSD 6 and 7 (#15834)

Since this is now the default package manager, it got moved
to another location on Netbsd :

  netbsd# type pkgin
  pkgin is a tracked alias for /usr/pkg/bin/pkgin
  netbsd# uname -a
  NetBSD netbsd.example.org 6.1.4 NetBSD 6.1.4 (GENERIC) amd64

But since the package manager is also used outside of NetBSD, we
have to keep the /opt/local path too.
thaim/ansible,thaim/ansible