Whitespace: 8 spaces -> tab

No longer use obsolete test(1) -a option/operator, use sh && instead.

While here a couple of minor formatting improvements - in general it
is always a good idea to surround sh operator chars (like '>' '(' ...)
with white space, to guard against thet possibility that some other (or
later enhanced) sh might have additional operators which happen to be
the character string used.

I don't understand while the final part of the condition for not doing
anything needs to run in a subshell, but that can stay for now.

branches: 1.1.2;
/etc/rc.d/cerctl_init: New script for certctl rehash in live images.

This is very limited -- it does not supplant postinstall to rehash
certificates on upgrade; it only runs certctl rehash if
/etc/openssl/certs is an empty directory, as you get in live images
not created with sysinst.

We could also have a more general-purpose way to run postinstall(8)
on first boot of an image, but that has a lot more moving parts to
think about, so let's start with this limited-scope low-risk
approach.

PR install/57629

XXX pullup-10