[META] Identify component maintainers for components with no maintainer listed in MAINTAINERS.txt

As part of our efforts to manage Drupal 8 technical debt toward release, we're trying to make sure that every current Drupal core component has at least one active comaintainer. The first step is to identify component maintainers for those components that don't already have one listed.

Component not listed

1. Field system. (Presumably this should be the Field module maintainers and/or the entity module maintainers.)
2. Typed data system.
3. Node system. (Node is just a module now; let's move all issues from this component to node.module and remove the component.
4. User system. (Presumably this should be the User module maintainers.)
5. Action module
6. Ban module
7. Date module
8. E-mail module
9. Entity module (presumably the entity system maintainers)
10. Field SQL storage module (Field maintainers?)
11. History module
12. Language module
13. Layout module (unused, may be removed)
14. Link module
15. Number module
16. Options module
17. Serialization module
18. Phone module
19. Text module
20. XML-RPC module

Component listed with no maintainer

1. Color module
2. Configuration module
3. Content translation module
4. Help module
5. Mail system
6. Menu module
7. Overlay module
8. PHP module
9. System module
10. Toolbar module

Related issues

Sub-issues

• #1823042: Add maintainers and d.o components for all field type modules
• #2048925: Add JohnAlbin as a component maintainer for CSS
• #2045901: Add Wim to MAINTAINERS.txt for editor.module and ckeditor.module
• #2050511: [Policy, no patch] Remove the "Node system" component; it is redundant with node.module
• #2050815: Update XML-RPC entry for 8.x in MAINTAINERS.txt
• #2050821: Add larowlan as a component maintainer for comment.module

Other related issues

• #2050451: Formalize the role of core component maintainers
• #2046081: Add issue queue integration to formalize the role of core component maintainers
• #2046091: Add a view of issues per component
• #1854480: Update MAINTAINERS.txt
• #2050763: [Policy, no patch] Refine "base system" component