Add "first contact" feature
Created by: dingcycle
The first_shot feature (or first_contact) is introduced as a 4th possible use for the spameater instance. Sometimes, the spameater human user will initiate themself the contact with a remote non-trusted third party. e.g. a spameater user (judy) wants to initiate a contact to a foreign address (billing@company-brand-55.com) judy@example.org.
She will therefore send an email to brand55.judy.billing_company-brand-55.com@erine.email.
The spameater instance job will be to relay this email
This commit also creates creates 4 "constants" to be used in several conditionals inside the script (one for each spameater possible job).