Origin for each line in SECURITY.md from check-in c1ddb4c814:

c1ddb4c814 2021-03-01    1: # Security Information
c1ddb4c814 2021-03-01    2: 
c1ddb4c814 2021-03-01    3: ## Reporting a Vulnerability
c1ddb4c814 2021-03-01    4: 
c1ddb4c814 2021-03-01    5: Please visit the author's homepage, [DL2MIE](https://dl2mie.darc.de/), for contact details.