Disable certificate verification for Fritz!Boxes

[OnlineArts]

Basically, all FritzBox's using self-signed certificates if you're enable HTTPS.

Edit: Wrong issue reference.

[andig]

This code is not used or will soon not be, see #78. I also wont accept a pr for a deliverately insecure configuration und user specifies so.

[OnlineArts]

Your right. Obviously, that's a wrong reference.

It's a fix for a new issue:
Using HTTPS secured Fritz!Box connection will automatically leads to a self-signed certificate by the Fritz!Box. Unfortunately, your script does not allow default https encryption at all since Fritz!Box's are use by default self-signed certificates. That's why I get a similar error like #64 but your right, self-signed certificates for webdav-server should not be supported.

At least it would be great to allow optionally the default https encryption for Fritz!Box connections.

[andig]

Could you reimplement this on top of #96?