ddns-scripts: Increment PKG_RELEASE

Increment PKG_RELEASE to reflect changes
Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
ddns_scripts: url encode USERNAME and PASSWORD

New function __urlencode() to remove special chars used in send_update() for username and password.
username might have email address and password might have special chars for security reasons.
Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Merge pull request #389 from chris5560/master

ddns_scripts: url encode USERNAME and PASSWORD