Import upstream v0.16.22, stripped

Upstream commit: 474dd0229cb20cf513036619781ed97bd8073c3f
Enterprise-only files removed or emptied: 63
Enterprise-only snippets removed: 117 in 50 files
Dangling module declarations removed: 5
Cargo edits turning enterprise off: 14
Verification: clean
Enterprise feature gates left for rebuilt features: 19 in 18 files

Produced by tools/fork/strip.py. The full report is in docs/fork/strip-reports/ on main.

tests/resources/imap/013.txt

@@ -0,0 +1,22 @@
+Date: Mon, 13 Aug 1998 17:42:41 +1000
+Message-Id: <[email protected]>
+From: Bill Clinton <[email protected]>
+To: A1 (The Enforcer) Gore <[email protected]>
+Subject:  Map of Argentina with Description
+MIME-Version: 1.0
+Content-Type: text/plain; charset=us-ascii
+Content-Transfer-Encoding: 7bit
+
+Hi A1,
+
+I finally figured out this MIME thing.  Pretty cool.  I'll send you
+some sax music in .au files next week!
+
+Anyway, the attached image is really too small to get a good look at
+Argentina.  Try this for a much better map:
+
+     http://www.1one1yp1anet.com/dest/sam/graphics/map-arg.htm
+
+Then again, shouldn't the CIA have something like that?
+
+Bill