Don't factor out dynamic DNS providers

[9b]

When sending indicators into Blockade cloud nodes, we prune out likely good sources using Alexa and other lists. Due to popularity, dynamic DNS providers are likely to exist in these lists and will mean they are removed from being sent to the node. This causes issues as many malware samples will use dynamic DNS.

[villain]

perhaps leave the dynamic DNS providers in the list, but add an override/ignore option to force the indicators to be sent

[9b]

Going with that concept and will apply it for incoming descriptions as well.