Realistic PMC Roster

From https://lists.apache.org/thread.html/596486fff6e88742e0ecc428d5c190cd3564ac8452a24917896a34a8@%3Cdev.netbeans.apache.org%3E:

One thing that I like to add is checking that the suggested PMC roster
is realistic, i.e. consists of people who are actually active.
https://whimsy.apache.org/roster/ppmc/netbeans lists 85 PPMC members,
I suppose a number of them aren't really active.

To prune this roster I suggest that the PPMC asks all these people
(via this list, with an [IMPORTANT] subject line header maybe) to
confirm that they are active or intend to become active again soon.
And mention that if they don't reply within a given amount of time
they won't be included in the proposed PMC roster. Maybe just send the
proposed roster here and ask people to confirm.

If someone is removed and becomes active again after graduation it's
easy to re-add them with a PMC vote, so I think it's better to start
with a smaller but realistic list of PMC members.

Pruning the Roster

Green – no question, this person is active and committed

Orange - not sure, let's check

Red - checked, they said "no, please remove me"

Blue - checked, they said "I haven't been active, will become active, please keep me"

PPMC entries above with (*) do not appear to be subscribed to the private list. This could be because the person is subscribed with an address that is not in their LDAP record.