Merge the latest trunk enhancements into the exists-to-in branch.

FossilOrigin-Name: 13c4c9088cc8a2426e30a2ad1e9b9969407249281c6ed16653d43a0e6852a2e4

diff --cc manifest
index 93a625e98ac4f35913e707ea06acb98690253331,c00d0af4e9b610658dd0ee2f9a00a120fca8c900..afcc0dca9c4106c3605a8489692fe58c54fcf834
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Add\ssimple\stests\s(and\sa\sfix)\sfor\sthe\schange\son\sthis\sbranch.
- D 2021-01-15T11:39:46.131
 -C Improvements\sto\sthe\smin/max\soptimization.\s\sFix\sfor\sa\sperformance\nregression\sintroduced\sat\s[b8ba2f17f938c035]\sreported\sby\n[forum:/forumpost/4050026ab8|forum\spost\s4050026ab8]
 -D 2021-01-14T20:57:47.228
++C Merge\sthe\slatest\strunk\senhancements\sinto\sthe\sexists-to-in\sbranch.
++D 2021-01-15T14:15:31.281
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -627,10 -627,10 +627,10 @@@ F src/vxworks.h d2988f4e5a61a4dfe82c652
  F src/wal.c 69e770e96fd56cc21608992bf2c6f1f3dc5cf2572d0495c6a643b06c3a679f14
  F src/wal.h c3aa7825bfa2fe0d85bef2db94655f99870a285778baa36307c0a16da32b226a
  F src/walker.c d9c4e454ebb9499e908aa62d55b8994c375cf5355ac78f60d45af17f7890701c
- F src/where.c 3d31871d03906312d7d71a9c0b28c97bcbaead7606dfc15f9b3d080b18702385
+ F src/where.c 0e6abb22a2323fec80b450825593c26a2ad8f4815d1ee3af9969d8f6144bf681
  F src/whereInt.h 9a3f577619f07700d16d89eeb2f3d94d6b7ed7f109c2dacf0ce8844921549506
  F src/wherecode.c a3a1aff30fe99a818d8e7c607980f033f40c68d890e03ed25838b9dbb7908bee
 -F src/whereexpr.c 3a463e156ea388083c501502229c2c7f4f5c6b5330ea59bdf40d6eb6e155a25f
 +F src/whereexpr.c 1f4fac8ea8eac6facb9e80107c659094a56a8ad0b35108717ac99ea57bbc71bc
  F src/window.c edd6f5e25a1e8f2b6f5305b7f5f7da7bb35f07f0d432b255b1d4c2fcab4205aa
  F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
  F test/affinity2.test ce1aafc86e110685b324e9a763eab4f2a73f737842ec3b687bd965867de90627
@@@ -1896,7 -1895,8 +1896,7 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 9f90a88221d0694951c353e58efce342eb0b868b8ca6a4469c8205e5c7855b24
- R 9984162db1d3035db01dde79c4fce484
- U dan
- Z 278fef5940bb689562d7ebf0ab17cbb2
 -P 11e4eb095746602961a178044809a68a77ba7b367596997bef726e54062423d9 ccd3bae14b6b47bb0f9622700c04db989f76ce65e10e0709964cfd0675eca762
 -R 3dc0d948d76c5e90d01be3a954f85921
 -T +closed ccd3bae14b6b47bb0f9622700c04db989f76ce65e10e0709964cfd0675eca762
++P 897f3f40267dc922f0fda287484435e1fd8709bade3e87c3829e2f945bb5e4aa 249a71cc6822d6bdd5bb9e727aac81c6549693b418e9c0987b96850ee332c940
++R 6fb3b1c5ffde39ec234334a7c5ffcb56
+ U drh
 -Z 8ad13e36552647d99e513fed14d21def
++Z 90ae5651a54d924d6159985985e1584c

diff --cc manifest.uuid
index ace34aaabc2558dd6028676a7e8b4a33162b6dba,6ee0559a9e5e2629618f6140c0e4b02d99e138dd..88f1bf8bcae0e89f68bc0f614660f5668ecaeb37
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 897f3f40267dc922f0fda287484435e1fd8709bade3e87c3829e2f945bb5e4aa
 -249a71cc6822d6bdd5bb9e727aac81c6549693b418e9c0987b96850ee332c940
++13c4c9088cc8a2426e30a2ad1e9b9969407249281c6ed16653d43a0e6852a2e4