Cleaned `module/unit': cosmetic, wording

The two sections previously called DYNAMIC and STATIC were irrelevant,
and have hence been renamed to what they actually are: `prime', and
`execute'.

Excess noise removed (too many hash-lines).

General cosmetic clean-up.
Updated `dynamic.csv' for net: closes nima/site#3

Fixed `:net:portping' arguments.
Updated `module/dns': updated `:dns:fqdn()'

This function now tries to determine if the hint supplied is already
a fqdn (by means of known fqdns and `:dns:qialified()'), and if not,
then do it will fall back to the existing logic/code.

This should simplify things for most callers that had to do this work
themselves, and speed things up in the case that the hint supplied was
already an fqdn.
Updated `module/net': new, fix

New:

    `:net:portpersist' - keep trying for an open port using socat, and
    do so `${attempts}' times.

Fix:

    The internal and private functions should not have variable
    arguments, this is the work of the public function; fixed
    `:net:portping()'.

    Fixed small bug with `:net:portping()' where tldid was not set in
    the case where the fqdn was external.
Added `module/net' unit tests: closes nima/site#7