o For QA purpose, add optional target package-canonical.
Using this packaging method, packages must build
without errors. Nevertheless we'll go our own way.
o Change packaging method from generic one to FreeBSD's
native one. This works well for both packaging method
and slightly saves disk space as well.
o Fix some problems arose by using FreeBSD's native
packaging method.
Result of: CodeFest Japan 2005
https://members.fsij.org/trac/codefest2005/