1. When the hostname script-arg was used, the script would try to
*connect* to that host instead of the target. Now the argument is used
*only* for the Host: header.
2. The http options table is reused for each request, significantly
reducing the load on the garbage collector over many requests.
3. Do not use both creds.Credentials:new() and creds.Account:new(),
since this results in double-reporting found credentials.
In addition to fitting better (brute library is the verb, creds library
is the noun), this will allow creds.lua to use creds.Account internally
where necessary (see subsequent commits)
Also change old references to string argument "OPEN" into
creds.State.VALID.
Clean up some typos and differences. Most have been normalized to
whatever form of the name occurred in the largest number of scripts.
Paulino was contacted directly and requested his email be added to all
of his credits.
