* most code reviewed with help of splint
* introduce new option handling (in/out/action)
- old options are still supported, no plans to remove this
support in next releases
* some automagically handling relating to
- input
- output
- action
if not extra specified
* add more conversions, also add more support of IPv4 addresses
* the address information option (-i) now shows also
- IPv4 registries (by using included current IPv4 CIDR table)
- IPv6 registries
- OUI (vendor) of NIC, if EUI-48/64 is a global one
* an example CGI frontend called "ipv6calcweb.cgi" to display
information about a REMOTE_ADDR on a webpage
- See e.g. http://ipv6.aerasec.de/index2.html for what can be
displayed
- Currently supported languages: en, de
