lib: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Integrate lib/libutil into the build/kyua

Remove the .t wrappers

Rename all of the TAP test applications from test-<test> to
<test>_test to match the convention described in the TestSuite
wiki page

humanize_number_test.c:

- Fix -Wformat warnings with counter variables
- Fix minor style(9) issues:
-- Header sorting
-- Variable declaration alignment/sorting in main(..)
-- Fit the lines in <80 columns
- Fix an off by one index error in the testcase output [*]
- Remove unnecessary `extern char * optarg;` (this is already provided by
unistd.h)

Phabric: D555
Approved by: jmmv (mentor)
MFC after: 2 weeks
Obtained from: EMC / Isilon Storage Division [*]
Submitted by: Casey Peel <cpeel@isilon.com> [*]
Sponsored by: EMC / Isilon Storage Division