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/samples/ddns.config_sample

@@ -115,9 +115,13 @@ config service "myddns"
 #	option update_script   ""
 
 	###########
-	# You must specify your domain/host name, your username and your password
-	# as you get from you DDNS provider. Keep an eye on providers help pages.
+	# Keep an eye on providers help pages.
 	#
+	# FQDN of ONE of your defined host at DDNS provider
+	# REQUIRED to verify what the current IP at DNS using nslookup/host command
+	# default: none
+	option lookup_host ""
+
 	# Your DNS name / replace [DOMAIN] in update_url
 	# default: none
 	option domain ""
@@ -126,10 +130,21 @@ config service "myddns"
 	# default: none
 	option username ""
 
-	# Password of your DDNS service account / replace [PASSWORD] in update_url
+	# Password of your DDNS service account / replace [PASSWORD] in update url
 	# default: none
 	option password ""
 
+	###########
+	# Optional parameters for use inside update_url
+	#
+	# parameter that will be urlencoded before replacement of [PARAMENC] inside update url
+	# default: none
+	option param_enc ""
+
+	# parameter that repace [PARAMOPT] inside update url
+	# default: none
+	option param_opt ""
+
 	###########
 	# use HTTPS for secure communication with you DDNS provider
 	# personally found some providers having problems when not sending