ddns-scripts: fix issue (#337) current/registered ip never match

new extraction of IP inside function get_registered_ip for host and nslookup
thanks to jow for the sed

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
ddns-scripts: fix issue (#337) current/registered ip never match

Increase PKG_RELEASE to reflect changes

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Merge pull request #348 from chris5560/master

ddns-scripts: fix issue (#337) current/registered ip never match