Solaris 9 work + reenabling strftime conversions.

	1. Differentiate suppression meta for Solaris 9/10

	2. After the fix #1598 is merged, %F and %s will be usable via
	the strftime() builtin. Reenable strftime.cf for Solaris 9 and
	HPUX
Suppress some tests on FreeBSD

See:

	1. https://cfengine.com/dev/issues/5261 (link obstructions)
	2. https://cfengine.com/dev/issues/5224 (intermittent failures
	shared with Solaris, plus zombies)
testall: s/%F/%Y-%m-%d/

This will make HP-UX and Solaris X<10 happy, as the equivalent shorthand
conversion doesn't exist there.