license" to "Same as Nmap--See http://nmap.org/book/man-legal.html" like
scripts commonly use. I added the field to some modules I know to be under the
Nmap license: bin, datafiles, dns, nmap, unpwdb. I left alone bin, bit, pcre,
and url, which come from outside sources.
http, ipOps, listop, and match. This is mainly merging the best documentation
from the module source and scripting.xml into the module, with the aim of
making the source code the canonical source for module documentation.
