Changes

BREAKING CHANGE simplification of options
- remove safe mode (-s and previous default)
- make files mode to be the default
- the current synopsis is sysclean [-a | -p] [-i]
make /etc/changelist to be included by default in ignore list
ignore /etc/sysclean.ignore too
use rcctl(8) information to extended expected files - it adds more magic and less required entries in /etc/sysclean.ignore
add a small regression suite (mostly for man page)

New managed paths