Documentation: Add section on how the project responds to legal threats

Threatening or initiating legal action against the maintainers of our
infrastructure or projects (all projects hosted on our infrastructure)
is a huge stressor to those maintainers.

To underline that severity, such threats or action will lead to an
immediate ban from our infrastructure as agreed on the leadership
meeting of 2023-05-31.

There may be legitimate legal action to take in certain cases, and
it's always possible to unban people, but given the severity provide
warning that we'll opt for a "ban first, sort out later" approach.

Change-Id: Ifa865487dc81ed3797fe60e5cef737c57dd85fea
Signed-off-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75554
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

Documentation/community/code_of_conduct.md

@@ -95,6 +95,17 @@ If you feel you have been falsely or unfairly accused of violating this
 Code of Conduct, you should notify the arbitration team with a concise
 description of your grievance.
 
+## Legal action
+
+Threatening or starting legal action against the project, sibling
+projects hosted on coreboot.org infrastructure, project or infrastructure
+maintainers leads to an immediate ban from coreboot.org and related
+systems.
+
+The ban can be reconsidered, but it's the default action because the
+people who pour lots of time and money into the projects aren't interested
+in seeing their resources used against them.
+
 ## Scope
 
 We expect all community participants (contributors, paid or otherwise;