ddns-scripts: fix dynv6.com "unchanged" response

Maintainer: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Run tested: LEDE Reboot 17.01.3 r3533-d0bf257c46

Description:

user.err ddns-scripts: IP update not accepted by DDNS Provider

dynv6.com response "unchanged" is OK

Signed-off-by: Ernest Moshkov <e.moshkov@gmail.com>

net/ddns-scripts/Makefile

@@ -12,7 +12,7 @@ PKG_NAME:=ddns-scripts
 PKG_VERSION:=2.7.6
 # Release == build
 # increase on changes of services files or tld_names.dat
-PKG_RELEASE:=18
+PKG_RELEASE:=19
 
 PKG_LICENSE:=GPL-2.0
 PKG_MAINTAINER:=Christian Schoenebeck <christian.schoenebeck@gmail.com>

net/ddns-scripts/files/services

@@ -103,7 +103,7 @@
 
 "dynu.com"		"http://api.dynu.com/nic/update?hostname=[DOMAIN]&myip=[IP]&username=[USERNAME]&password=[PASSWORD]"
 
-"dynv6.com"		"http://dynv6.com/api/update?hostname=[DOMAIN]&token=[PASSWORD]&ipv4=[IP]"	"updated"
+"dynv6.com"		"http://dynv6.com/api/update?hostname=[DOMAIN]&token=[PASSWORD]&ipv4=[IP]"	"updated|unchanged"
 
 "easydns.com"		"http://[USERNAME]:[PASSWORD]@api.cp.easydns.com/dyn/generic.php?hostname=[DOMAIN]&myip=[IP]"	"NOERROR"
 

net/ddns-scripts/files/services_ipv6

@@ -67,7 +67,7 @@
 
 "dynu.com"    "http://api.dynu.com/nic/update?hostname=[DOMAIN]&myipv6=[IP]&username=[USERNAME]&password=[PASSWORD]"
 
-"dynv6.com"		"http://dynv6.com/api/update?hostname=[DOMAIN]&token=[PASSWORD]&ipv6=[IP]"	"updated"
+"dynv6.com"		"http://dynv6.com/api/update?hostname=[DOMAIN]&token=[PASSWORD]&ipv6=[IP]"	"updated|unchanged"
 
 "goip.de"		"http://www.goip.de/setip?username=[USERNAME]&password=[PASSWORD]&subdomain=[DOMAIN]&ip6=[IP]"