Add the 'txn' date/time format. Change CURRENT_TIMESTAMP and similar to use

'tnx'-style semantics instead of 'now'-style.

FossilOrigin-Name: 61cc8ed8d3541eddf23a9d542179c3f0223c5b8519b54d3be79988a376e25a89

diff --cc manifest
index 27ea0b142c787d1d96ce892ac194dd9b53bbaf94,1e6875435e7e1f571d690f669c2f8cfb0d60cd94..1c38152cce31a5f600aa9a95d4ffed6a2cc7fa2e
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Merge\swasi-patches\sbranch\sinto\strunk.
- D 2023-02-08T08:49:52.993
 -C Test\scases\sto\sshow\sthat\sCURRENT_TIMESTAMP\sand\ssimilar\shold\sthe\ssame\svalue\nacross\sa\stransaction.
 -D 2023-02-08T12:31:47.043
++C Add\sthe\s'txn'\sdate/time\sformat.\s\sChange\sCURRENT_TIMESTAMP\sand\ssimilar\sto\suse\n'tnx'-style\ssemantics\sinstead\sof\s'now'-style.
++D 2023-02-08T12:47:37.844
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -622,11 -622,11 +622,11 @@@ F src/random.c 606b00941a1d7dd09c381d32
  F src/resolve.c d62c5665279cc7485f9d45b5e20911cc7b19c203f268321a90d05d74f4725750
  F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
  F src/select.c c3ce1b49cca2c66c8c88fe7d9e1f3db23590deb4dd631619ad90e1e5d21bcf1f
 -F src/shell.c.in 250817509dbf12e258e334fdcd87901e35a6b63dc285885fec5f577ebb67b498
 -F src/sqlite.h.in e26116b4dba94903c78db0f3281493435cf70ee049e2e8270b1013fad740fdb1
 +F src/shell.c.in 623d793be69c1d9592447fa6e1dbabfce46758821f2b63d6cde2c8cd1d472641
 +F src/sqlite.h.in c060f9e6f646fd817abf273c068666e079fc6e8467ea1d3e8b20f355f82722e9
  F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
  F src/sqlite3ext.h da473ce2b3d0ae407a6300c4a164589b9a6bfdbec9462688a8593ff16f3bb6e4
- F src/sqliteInt.h 43eeee1ea80543a0e40444bf53643ca259a2b1158ccfe859a6a6435b7358ecdd
+ F src/sqliteInt.h 859e193140c393a9a50dd81345b95130b208a312dd064867065c5e637232ed58
  F src/sqliteLimit.h d7323ffea5208c6af2734574bae933ca8ed2ab728083caa117c9738581a31657
  F src/status.c 160c445d7d28c984a0eae38c144f6419311ed3eace59b44ac6dafc20db4af749
  F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@@ -2045,9 -2045,8 +2045,9 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 2abc3f9de0d2b66342598ab9015e62568ed20c7da4744a0f0a76b1db72c7e941 656d36f50f630da68262469087bad1ac71b10325e233a7963103c8cbc232f61a
- R 7644b35acb2adcbe9465af90730ac93f
- T +closed 656d36f50f630da68262469087bad1ac71b10325e233a7963103c8cbc232f61a Closed\sby\sintegrate-merge.
- U stephan
- Z faa4f9c7961b812c919d8c373bc1fa2c
 -P 06180caff0f5d8aba83b9f7be682ccdd6cb2ffc228b557ee6c1fd00fe5c23e92
 -R 191c2a25e4d73ba45ecc912c47f9a8ca
++P 9902e66a37d59c1909593bbc296091df3fa3bfa12ec7062bd84e458030f77c8d 7b2fa20e31b8a0314b9ccb97bb556898d552505dbc5943f248df3f86c0f4e008
++R 645bf11b6f82132024c9558d18e0aef7
++T +closed 7b2fa20e31b8a0314b9ccb97bb556898d552505dbc5943f248df3f86c0f4e008
+ U drh
 -Z bc216ff029b87470207499db9cc62288
++Z 2be6e595f8a3c82105db9bee2081e8f8
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 88dc084a670e972dfc4c872e243605c9b956bf97,604bf7c5e3176b67792404c498a8be2c6d67e2d7..12478fb90063d30bdce8ec87c4813f0b30b3b1dd
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 9902e66a37d59c1909593bbc296091df3fa3bfa12ec7062bd84e458030f77c8d
 -7b2fa20e31b8a0314b9ccb97bb556898d552505dbc5943f248df3f86c0f4e008
++61cc8ed8d3541eddf23a9d542179c3f0223c5b8519b54d3be79988a376e25a89