Issue #1821882 by tim.plunkett: Add an entry for 'Plugin system' to MAINTAINERS.txt.

core/MAINTAINERS.txt

@@ -118,6 +118,10 @@ Path system
 - Dave Reid 'davereid' http://drupal.org/user/53892
 - Nathaniel Catchpole 'catch' http://drupal.org/user/35733
 
+Plugin system
+- Kris Vanderwater 'EclipseGc' http://drupal.org/user/61203
+- Alex Bronstein 'effulgentsia' http://drupal.org/user/78040
+
 Render system
 - Moshe Weitzman 'moshe weitzman' http://drupal.org/user/23
 - Alex Bronstein 'effulgentsia' http://drupal.org/user/78040