Update mentoring description in MAINTAINERS.txt and add current maintainers alimac, heddn, valthebald, cilefen

I am honored. The list of tasks in #3 describes what I have been doing in the past year. My goal is always to improve the things that can be improved and automate the things that can be automated.

To echo alimac, I'm equally honored. For a while now, I've thought that the best way to get D8 was to duplicate myself and get work done through others. It is exciting to see folks that I have mentored over the years become very active participants in seeing D8 get out the door. The only thing I'd add to the list in #3 is that I'm also involved in mentoring at camps and sprints.

A hearty +1 to all the suggested inclusions!

The core mentoring coordinator responsibilities, are:

1. Organizing IRC mentoring office hours.
2. Organizing mentoring at DrupalCons.
3. Communicating the principles of mentoring.
4. Responding to inquiries about mentoring to local organizers.
5. Being available to other mentors.

Of these, I do 1, 3, and 5. I could do 4, and I have mentored at non-Drupal OSS events. But 2, organizing events, is not an area of strength for me. I know myself enough by now to be sure about that. Avoid disappointing surprises by never having me plan an event.

The honor would be mine, too. From Chris's list, I would like to participate more in 2 (organizing mentoring on DrupalCons). During the last year, I've helped to organize sprints in 2 camps (Wroclaw and Sofia).

+++ b/core/MAINTAINERS.txt
@@ -511,13 +511,23 @@ Web services
+Drupal Core mentoring coordinators do mentoring strategy, mentor recruitment,
+and mentor-mentoring.

This sentence doesn't make much sense.

+++ b/core/MAINTAINERS.txt
@@ -511,13 +511,23 @@ Web services
+process, to make it easier for new contributors to get involved. They organize
+communications and logistics. And, they actively participate as a mentor.

I think the comma after "process" is not needed, and it should probably be "processes" to match the plurality of tools and documentation.

Also I would combine the last two sentences:

"They organize communications and logistics and they actively participate as mentors."

But besides that everyone has commented so once we get wording ironed out this is RTBC I'd say.

Try: "Drupal Core mentoring coordinators strategize, recruit mentors, and mentor the mentors." or similar.

Reworded some things, and put the names in alpha order. I didn't bother with an interdiff since almost every line is different.

Changed some wording again. Cilefen and I were discussing this in person. We had an actual author agree that the word strategize in that sentence is awkward and superfluous.

Dries takes care of maintainers.txt

Committed to 8.x! Thank you!

@Dries Thank you too. We'll keep on-boarding more developers!