Fix an error in the validation code when the public key is in a
nonstandard location. The check command fails and the key is
incorrectly assumed to be expiring.
When keys get refreshed a folder with the permissions of the root user
get created in the home directory of the user dnscrypt-wrapper. This
prevents the service from restarting.
In addition to that the parameters of dnscrypt-wrapper have
changed in upstream and in the newly packaged software.
