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>

Squashed commit of the following:

commit fc1d42f069
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 18:01:43 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

commit 731f9b4df0
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 17:59:25 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

    personal helper script to create hashes for CA-Certificates for Wget and cURL using https protocol without errors.

    Sorry GitHub web interface only supports single commits that will be summarized into one pull request.
    Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

commit df8f6c9d5d
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 17:56:05 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

    rewritten

    Sorry GitHub web interface only supports single commits that will be summarized into one pull request.
    Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

commit 50cdf5acb9
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 17:54:40 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

    rewritten

    Sorry GitHub web interface only supports single commits that will be summarized into one pull request.
    Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

commit b1d650a345
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 17:52:52 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

    not needed in this version

    Sorry GitHub web interface only supports single commits that will be summarized into one pull request.
    Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

commit 9532114b03
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 17:51:39 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

    same function as existing services file but used for IPv6

    Sorry GitHub web interface only supports single commits that will be summarized into one pull request.
    Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

commit a636bc25c6
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 17:46:56 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

    New file explaining availible parameters.

    Sorry GitHub web interface only supports single commits that will be summarized into one pull request.
    Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

commit 52332354fc
Author: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Date:   Sun Sep 21 17:44:45 2014 +0200

    [ddns-scripts] Update to Version 2.0.1-1

    Sorry GitHub web interface only supports single commits that will be summarized into one pull request.

    Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

Signed-off-by: Liviu Pislaru <liviu@duiadns.net>

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>

Service provided by Securepoint GmbH, 21335 Lüneburg, Germany
Info at http://www.spdns.de

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

To be consistent with other services only start via hotplug if enabled.
Now full functionality of /etc/init.d/ddns enable/disable start/stop

Optimization: Include script only if needed

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

Hotplug script will start service for each interface.
To prevent duplicates and in general must not start on boot.

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>