PSL update: Add domains of Individual Network Berlin e.V. (#711)

[layershifter]

Add domains of Individual Network Berlin e.V. (#711)

IN-Berlin e.V. gives subdomains to their users. They are being used

for webhosting, virtual servers, dedicated servers, DSL and VPN.

As every subdomain is operated by another user we think that adding cookie security is very important. Also our users can request Let's Encrypt certificates for their subdomains. Therefore we often hit the limits at Let's Encrypt and sometimes cannot request a certificate for our own infrastructure because there have been too many certificates requested by users.