ddns-scripts: rollup to version 2.5.0-1

- 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>

net/ddns-scripts/files/ddns.config

@@ -1,6 +1,5 @@
 #
-# Please read ddns.sample
-# or http://wiki.openwrt.org/doc/uci/ddns
+# Please read http://wiki.openwrt.org/doc/uci/ddns
 #
 config ddns "global"
 	option date_format "%F %R"
@@ -12,6 +11,7 @@ config ddns "global"
 
 config service "myddns_ipv4"
 	option service_name	"dyndns.com"
+	option lookup_host	"yourhost.example.com"
 	option domain		"yourhost.example.com"
 	option username		"your_username"
 	option password		"your_password"
@@ -21,6 +21,7 @@ config service "myddns_ipv4"
 
 config service "myddns_ipv6"
 	option update_url	"http://[USERNAME]:[PASSWORD]@your.provider.net/nic/update?hostname=[DOMAIN]&myip=[IP]"
+	option lookup_host	"yourhost.example.com"
 	option domain		"yourhost.example.com"
 	option username		"your_username"
 	option password		"your_password"