Pekka Paalanen authored Feb 12, 2021 and Pekka Paalanen committed Feb 22, 2021

This was prompted by a recent discussion on #dri-devel IRC channel,
where the use of pseudonyms to maintain anonymity was said to be a
normal and accepted practice. See:
https://people.freedesktop.org/~cbrill/dri-log/index.php?channel=dri-devel&highlight_names=&date=2021-02-09
and look for the discussion around pq and Lyude.
Until then, I was hesitant to accept Signed-off-by's with names that
looked very much not a real name.

Clarify our documentation that pseudonyms are ok.

Note, that is not what the Linux kernel documentation says today in
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst
which says that pseudonyms are not ok. According to the discussion, this
should probably be fixed in the kernel too.

Since we are now ok with pseudonyms in Signed-off-by, there is no reason
left to accept any patches without a Signed-off-by. This clarifies our
policy and takes the burden of case-by-case consideration away from
maintainers.

The wording about needing to use a personal email address is my
addition. The intention is to ensure a globally unique handle for a
person while that person remains anonymous, so that the Signed-off-by
cannot be mistaken for someone elses.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>