Allows us to define PC_GF_EMAIL_BLACKLIST or PC_GF_DOMAIN_BLACKLIST in our workload file and block the emails listed. The form will look like it was filled out but the entry is automatically sent to spam so the spammer is wasting their time. The plugin uses getenv() so you can also define a .env file with these values and blacklist items.

-  name: PC_GF_EMAIL_BLACKLIST
   value: email@one.com,email@two.com

Added ability to blacklist a domain with PC_GF_DOMAIN_BLACKLIST

-  name: PC_GF_DOMAIN_BLACKLIST
   value: one.com,two.com