On systems that /bin/sh is served by shells other than bash, or
shells that don't implement the same syntax as the bash printf builtin,
printf -- fails to produce the output necessary for standalone operation.
The test case for this was SmartOS, which uses ksh93 as its /bin/sh.
This change uses the more generic method of passing a format parameter
of a single string, and then the argument to replace it with.
Commands have been reordered in showhelp() to a more consistent grouping,
help > version > install > certs > csr > account > cron > other
All option alternatives in _process() case statement have been reordered toshow the canonical variants first, legacy variants after.