Allow "ALTER TABLE ... DROP CONSTRAINT" to drop foreign key constraints.

FossilOrigin-Name: 4b0882cdb5b7947b23023c13e33f532ca44c0645f6a142a3c7bdb143142d9078

diff --cc manifest
index 4fa0339a151bdec854f0fdffb4a67b60f8c08f28,3fc0eb9bec6b5d7e9e140bfaff6f4dc22bba9fc8..6e5c5b3f9b92ac45fd28938f6cf8ec9ef857658e
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C For\sdisplay\smodes\sin\sthe\sCLI\sfor\swhich\scolumn\sheaders\sare\senabled,\nmake\sthe\smode\s"always"\sinstead\sof\s"on.\s\sImproved\scomments\sand\stest\ncases.
- D 2026-07-08T15:43:42.959
+ C Allow\s"ALTER\sTABLE\s...\sDROP\sCONSTRAINT"\sto\sdrop\sforeign\skey\sconstraints.
 -D 2026-07-08T17:40:04.496
++D 2026-07-08T17:54:16.137
  F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@@ -2213,9 -2214,11 +2214,9 @@@ F tool/warnings-clang.sh bbf6a1e685e534
  F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
  F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
- P 4edba31af4ef18350cb415079fb92cae0c53767fc0e74d63d404296974e75e5c f94259fc07cd7856e9c6f81a46689f4f96bbf464fda7f1d11b51a308c296aca0
- R 688db872c29fb684e76bc6c6acf8cc9b
- T +closed f94259fc07cd7856e9c6f81a46689f4f96bbf464fda7f1d11b51a308c296aca0
- U drh
- Z aa42c4c981256f3d4f6c42fc99d72364
 -P c8aa208bf5b00f3ab93c5edd510dfd0d7edd271c064f159616ee409b308f7eb9
++P c8aa208bf5b00f3ab93c5edd510dfd0d7edd271c064f159616ee409b308f7eb9 17c08963812d6458783720c511806727aeae263a243a11d49b463d2c7867cd54
+ R 4bd3a46fbadb8b3a12b89cadb35de70a
 -T *branch * drop-constraint-fk
 -T *sym-drop-constraint-fk *
 -T -sym-trunk *
++T +closed 17c08963812d6458783720c511806727aeae263a243a11d49b463d2c7867cd54
+ U dan
 -Z 7b2661190251d9be0a0996978db71a70
++Z 69eaea413d4dc845591c3ed44775077d
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 9eba18e4276fdf8d58898182046a44b3af97b829,767d1600e9dfdea5a7d445ffea6a92d63b525ee0..1dacf7c52eb74243f9df821c2f648a78c606e225
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- c8aa208bf5b00f3ab93c5edd510dfd0d7edd271c064f159616ee409b308f7eb9
 -17c08963812d6458783720c511806727aeae263a243a11d49b463d2c7867cd54
++4b0882cdb5b7947b23023c13e33f532ca44c0645f6a142a3c7bdb143142d9078