- add -V / --version parameter to show version information
- new option lookup_host as host to use by nslookup/host to validate IP address changes, to be separate from [DOMAIN] parameter which produces a lot of questions in the forum and on multi-host updates
- new option param_enc for optional usage inside update_url [PARAMENC] (will be send urlencoded)
- new option param_opt for optional usage inside update_url [PARAMOPT]
- new service strato.de (IPv4 only) requested by ludwig.jaffe@
- new service variomedia.de (IPv4 & IPv6) requested by Wolfgang Oertl #1884
- rewritten function get_service_data to read services/service_ipv6 file
- allow 3rd parameter inside services/service_ipv6 file - here should be the answer of the ddns provider on success. If parameter is set, it's checked by ddns-scripts and report errors to logfile/syslog if failed and retry
- updated tld_names.dat

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

modified source directory structure
  - files for production files
  - samples for sample files (not installed in final build)
modified Makefile
  - separate options for additional provider scripts
  - remove comments and empty lines from final build
add IPv4 100.64/10 (RFC 6598) and 169.254/16 (RFC 5735) to the range of default blocked IP's.
new option "bind_network" to force GNU Wget or cURL to use specific network/interface for communication
new "domains.google.com" as IPv4 DDNS provider #822

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>