Merge enhancements from trunk.

FossilOrigin-Name: 9c50f6c28a4cadb2c33954c066a8e94f8aaf4c31b6c0309db35efc472cb0bcaa

diff --cc manifest
index 30dbc3466c7fc58a1b67a2fe350b6f5920bc33fc,f3cf77200e1e4e8fc6f5841f08cddf483a199019..2f8159f11482ea41012403e515eac0d22ef27d11
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Refactor\snames\sof\sflags\sfor\simproved\slegibility.
- D 2020-01-06T15:25:41.454
 -C Rewrite\sthe\s(debugging\suse\sonly)\ssqlite3VdbeMemPrettyPrint()\sfunction\sto\suse\nthe\ssafer\sStrAccum\sinterface\srather\sthan\swriting\sdirectly\sinto\sa\sstatic\sstring\nbuffer.\s\sPerhaps\sthis\swill\saddress\sticket\s[bbd55a97e66ff50d],\swhich\swe\sare\nunable\sto\sreproduce.
 -D 2020-01-06T19:23:41.424
++C Merge\senhancements\sfrom\strunk.
++D 2020-01-06T19:30:36.832
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -526,14 -526,14 +526,14 @@@ F src/pragma.h 5bbfafd74cf085762b64e4e2
  F src/prepare.c 6049beb71385f017af6fc320d2c75a4e50b75e280c54232442b785fbb83df057
  F src/printf.c 9be6945837c839ba57837b4bc3af349eba630920fa5532aa518816defe42a7d4
  F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
 -F src/resolve.c 31dc20837034491e5a043f411425a507b306ceedf40d666af5fc87b13020ff3d
 +F src/resolve.c f35aa580fd29a9213f43bc267f486bb26430352bf78d1ceef4a4c9735b4c9d24
  F src/rowset.c d977b011993aaea002cab3e0bb2ce50cf346000dff94e944d547b989f4b1fe93
- F src/select.c 64bf450dc0f2b37be8d2be6ff7d25a70de37ef6fb64527c68f767fe9fe47bc55
+ F src/select.c 80d1aac7017824b803c8e6bdb75f699e11aef22e02d29d206a523d8a3dcf2a13
 -F src/shell.c.in 90b002bf0054399cbbfac62dd752a9b05770427ba141bcba75eefbb0098f4280
 -F src/sqlite.h.in 51f69c62ba3e980aca1e39badcaf9ad13f008774fe1bb8e7f57e3e456c656670
 +F src/shell.c.in 6893d5b8d598aa59457c1490b8c9970c9b8d19d5f37951b3f831a0cd5f45a57c
 +F src/sqlite.h.in b2dc8fc4db9496b3b9c06d68026d83976e9b76afc8b53d16aadb68f3e5cc3ca0
  F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
  F src/sqlite3ext.h 72af51aa4e912e14cd495fb6e7fac65f0940db80ed950d90911aff292cc47ce2
 -F src/sqliteInt.h a694b38db1748007390cbafcaba56d5379203c23ab5ae7d3a538f367e8638102
 +F src/sqliteInt.h badbde0a53c2fb8311d7cd7f177a7bef70002658daa61d3effcaef365adb5f4b
  F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
  F src/status.c 9ff2210207c6c3b4d9631a8241a7d45ab1b26a0e9c84cb07a9b5ce2de9a3b278
  F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
@@@ -606,10 -606,10 +606,10 @@@ F src/vdbeInt.h 30d3e8b991547cdf39025e4
  F src/vdbeapi.c 1252d80c548711e47a6d84dae88ed4e95d3fbb4e7bd0eaa1347299af7efddf02
  F src/vdbeaux.c 3b2076c59217f964ff5fca348fa3f69c3157cbd5cafc549e9ea3252d8613c6a9
  F src/vdbeblob.c 253ed82894924c362a7fa3079551d3554cd1cdace39aa833da77d3bc67e7c1b1
- F src/vdbemem.c 05668cc1b44845736784f1ce9da46403dbf202c7c6d1a02205285cfc30e78f0d
+ F src/vdbemem.c ad9e6217635f2b04df98bc57b12c98cefc9c0a1745cca47f4e8109119213253d
  F src/vdbesort.c a3be032cc3fee0e3af31773af4a7a6f931b7230a34f53282ccf1d9a2a72343be
  F src/vdbetrace.c fa3bf238002f0bbbdfb66cc8afb0cea284ff9f148d6439bc1f6f2b4c3b7143f0
 -F src/vtab.c a2fead3e97fca54fcf3f3db784e17c9ee2d39a0c5ad323e9d514855106300a86
 +F src/vtab.c 7b704a90515a239c6cdba6a66b1bb3a385e62326cceb5ecb05ec7a091d6b8515
  F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
  F src/wal.c 15a2845769f51ba132f9cf0b2c7a6887a91fc8437892dbcce9fcdc68b66d60a1
  F src/wal.h 606292549f5a7be50b6227bd685fa76e3a4affad71bb8ac5ce4cb5c79f6a176a
@@@ -1853,7 -1853,7 +1853,7 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 65d7d39a858c51ffd781f5a6335e029895e597aeb1e1ccdadea8ce79c8ad412f
- R fb33b89473d770b763bebc42b1cd394c
 -P b3f2696705cc3e7b038f156423f808432a4680ea7e313dc15e34bdf6b1845655
 -R 90b6bd1ba31a9b128a324665d5b94d50
++P 411e8ec2219bb4181aaf2209fb1e7baf5e8df8b8c8adb82a69b48cf7e8e7e7d4 69f6a7e42f42116d29514239575ee1dc381b5b673da012cb5f3e8cf17922d493
++R d8f72677643e9e459892f006697ad02d
  U drh
- Z 6124e43a4879e0631853de887c7788db
 -Z 0e567cdf08d226c28800a15ad21e7761
++Z a5520af845981e19be8e15387b4c77ba

diff --cc manifest.uuid
index 46808f3518843de795141e22722d69172673b2ff,3c238675f6dbb61e9209a9c0d88072bc233f1378..b5a9169ffdd690d5773b4dcb8c0ba912cdcc6f79
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 411e8ec2219bb4181aaf2209fb1e7baf5e8df8b8c8adb82a69b48cf7e8e7e7d4
 -69f6a7e42f42116d29514239575ee1dc381b5b673da012cb5f3e8cf17922d493
++9c50f6c28a4cadb2c33954c066a8e94f8aaf4c31b6c0309db35efc472cb0bcaa