ddns-scripts: add service two-dns.de

Requested by: Martin Röcker <roecker@empty-v.de>
Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
ddns-scripts: Increment PKG_RELEASE

Increment PKG_RELEASE to reflect latest changes
Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Merge pull request #374 from chris5560/master

ddns-scripts: add service two-dns.de