MFC r292530,r292546:

r292530:

• Use 1 for an exit code instead of -1 with err, errx, and exit
• Add unistd.h for getuid(3)
• Sort #includes

r292546:

• Convert testcase to TAP format
• Use nitems(x) instead of handrolled sizeof(x) / sizeof(*x) macro
• Do not mark count != 0 case with bsde_get_rule_count as a failure; this generates false positives on systems with ugidfw rules set on it