r292650:
Move mac_bsdextended check up before running the test_libugidfw_strings testcases
I realize that these tests could be run before mac_bsdextended is loaded, but
it would overcomplicate things to special case handle the testcases before doing
the mac_bsdextended(4) feature check
The testcases will be split up so they can be run separately in the near future
r292651:
Delete the comment about running `test_libugidfw_strings` before testing
`mac_is_present` so it doesn't accidentally confuse people