bpo-38880: List interpreters associated with a channel end (GH-17323)



This PR adds the functionality requested by https://github.com/ericsnowcurrently/multi-core-python/issues/52.

Automerge-Triggered-By: @ericsnowcurrently
diff --git a/Misc/ACKS b/Misc/ACKS
index d4ffc36..89f37e5 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -456,6 +456,7 @@
 Ulrich Eckhardt
 David Edelsohn
 John Edmonds
+Benjamin Edwards
 Grant Edwards
 Zvi Effron
 John Ehresman
@@ -570,6 +571,7 @@
 Dan Gass
 Tim Gates
 Andrew Gaul
+Lewis Gaul
 Matthieu Gautier
 Stephen M. Gava
 Xavier de Gaye
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-11-22-14-34-47.bpo-38880.evcCPa.rst b/Misc/NEWS.d/next/Core and Builtins/2019-11-22-14-34-47.bpo-38880.evcCPa.rst
new file mode 100644
index 0000000..07a7f5e
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-11-22-14-34-47.bpo-38880.evcCPa.rst
@@ -0,0 +1 @@
+Added the ability to list interpreters associated with channel ends in the internal subinterpreters module.