Create database to track updates that have been performed
Add myonlineportal.net as new provider.

Fixes #10623.
Merge branch 'database'
Add option to ignore removal of IP addresses

On systems that had connectivity to e.g. IPv6 which they don't
have any more need to remove the IPv6 address from the DNS system.
Most providers do not support this and hence this case is completely
ignored and the invalid record is left in the DNS system.
Add runtime check for providers if all dependencies are met
DynU: Fix typo in function call
nsupdate.info: Use generic url for IPv4 and v6 address updates.
Update translations