CLI to cease dumping back to OS shell on single ^C when interactive.

FossilOrigin-Name: ba8e4378f21d529a248d2d60b60974fef0d6612dcaaa1f6b7f8a6946fc46b39b

diff --cc manifest
index 7c448800b824eb1bd936230ef2e1f8916b044af2,47bc9b974aa39b2e266bf663bda2ab5cc0cbff59..480b83ce0926afdb956962e377592f29d10a0218
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Ensure\sthat\sthe\sVACUUM\scommand\sis\snot\sconfused\sby\salternative\sencodings\swhen\nit\sis\sthe\sfirst\scommand\srun\son\snew\sdatabase\sconnection.\n[forum:/forumpost/09503b4d33|Forum\spost\s09503b4d33].
- D 2023-04-18T15:21:55.208
 -C Add\scomment\son\sCLI\s^C\sfix\s(because\sit\sis\sa\sbit\ssubtle.)
 -D 2023-04-18T22:53:30.926
++C CLI\sto\scease\sdumping\sback\sto\sOS\sshell\son\ssingle\s^C\swhen\sinteractive.
++D 2023-04-18T23:05:34.073
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -2058,8 -2058,8 +2058,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 5acc3ef83e16a9f2803981a6e61eca62fe177cac4eed1befe2ade3a5977a1eab
- R 1c9639553f364b83ea46a14ee324415d
- U drh
- Z 1f598f7bd83b32193e1562d0ae423411
 -P 7b1f635268bd5b093b22f832c3ac9e5d642d1aac5ebc620619be5a24930feb83
++P 8b0fe63f873661037351fc1eba6071b98b5c97a0fc8bd8a504a90d047f78bc0d 19c062f1cd814a33bf9c10928217464cddaea7c3291ff44e605901a86b82a06d
+ R 94128278c59c8b6776a5748252e83b85
+ U larrybr
 -Z e64ea4c126276298324ed24c1a272560
++Z 708f7e71cc9002b37b9149765bf28cad
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index e780b63eded1022efa4b68f6f7e616856ee992bc,bbf885151600f9fc272f40bbf4f9e67419b1d52b..c2ce3e51767c12f01e2f25b9fd3b9f6e21bbfa36
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 8b0fe63f873661037351fc1eba6071b98b5c97a0fc8bd8a504a90d047f78bc0d
 -19c062f1cd814a33bf9c10928217464cddaea7c3291ff44e605901a86b82a06d
++ba8e4378f21d529a248d2d60b60974fef0d6612dcaaa1f6b7f8a6946fc46b39b