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-test/search-size

@@ -0,0 +1,22 @@
+messages: all
+
+# get the middle size. don't trust precalculated values in case server
+# modifies the message while APPENDing it. Messages 3 and 4 have different
+# RFC822.SIZE, but with servers that store linefeeds as LFs they have the
+# same file size. This test catches if they search using file size.
+ok fetch 1:4 rfc822.size
+* 3 fetch (rfc822.size $size)
+
+ok search smaller $size
+* search 1 2
+ok search larger $size
+* search 4
+ok search not smaller $size
+* search 3 4
+ok search not larger $size
+* search 1 2 3
+
+ok search not smaller $size not larger $size
+* search 3
+ok search or smaller $size larger $size
+* search 1 2 4