- Upgrade to 2.2.1
* Raise an error when MOVED file has a wrong format instead of a weird
ruby error. (Reported by kris@FreeBSD.org).
* Fix a bug when -P always treated as -PP.
* Change PORT_UPGRADE environment variable with UPGRADE_PORT (contains
a package name for updating port) and UPGRADE_TOOL=portupgrade.
Discussed with skv@FreeBSD.org and DougB@FreeBSD.org.