Provide the -DSQLITE_LEGACY_JSON_VALID compile-time option to restore the

(incorrect) legacy behavior of json_valid(NULL).

FossilOrigin-Name: 00bc9f1b573d683829bf5eb301606c38d6a60fba957d8edaf59116c02cc650bf

diff --cc manifest
index 38ca5e045f26b7a6070c754e144467319c91d356,71a0136e3d96fe1ba6e76ee6af173272748c86fc..03fd812199fe2d6905e6a088871483bd67376fe0
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C New\stestcase()\smacro\sin\sthe\stokenizer,\sto\sbetter\sdocument\sits\sbehavior.
- D 2023-08-10T18:50:00.513
 -C Fix\sbug\sin\sthe\stest\scase\sfor\sthe\sprevious\scheck-in.
 -D 2023-08-11T11:24:44.728
++C Provide\sthe\s-DSQLITE_LEGACY_JSON_VALID\scompile-time\soption\sto\srestore\sthe\n(incorrect)\slegacy\sbehavior\sof\sjson_valid(NULL).
++D 2023-08-11T11:30:43.332
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -2050,8 -2050,8 +2050,9 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 4b0871fd367b6d9706e892aa13f64604967f5e3ba92381960f73aeabd3d23f84
- R a40fe5763d111aa30a3a21c2dead52e5
 -P 15c2eadbff8e732cca45d6c3771d1fcea5aab2127e87f2a611b41ccfef4d1a0d
++P b2fdac0b151864eb2aa79f0b0ee60f9c6d9f3eb8c7626605eac17a02a8cf59bc c5daae88612607aa7a8b13b021cf586fc66e8bcd1fa9d948a860c881b7247761
+ R 1fd792e259ede50066032d9f52ebbec8
++T +closed c5daae88612607aa7a8b13b021cf586fc66e8bcd1fa9d948a860c881b7247761
  U drh
- Z d5cf7898ce1eeb270f6b6924ff8af0dd
 -Z 90d7041782e85db6a33263bb95988886
++Z ea3c39c8df0296b13770ed14b59d7f43
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 6016c156881ed8c9aa93ec8f96f532804084da37,888fa3e59b977cfacb666304d91dfa3be099e212..479b2e5b050e6280b62c1cddf751e6a1b74ec2be
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- b2fdac0b151864eb2aa79f0b0ee60f9c6d9f3eb8c7626605eac17a02a8cf59bc
 -c5daae88612607aa7a8b13b021cf586fc66e8bcd1fa9d948a860c881b7247761
++00bc9f1b573d683829bf5eb301606c38d6a60fba957d8edaf59116c02cc650bf