Commit 4e7ff7b9223347c51ebbde43f0dd67f31738869e

DRC 2023-05-31T10:24:04

SECURITY.md: Wordsmithing and clarifications - Clarify that encrypted e-mail is optional. - Mention the new GitHub security advisory system. - Clarify that vulnerabilities against new features that are not yet in a Stable release series need not be reported securely.