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

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