sqlite3 : Make the +loadable_extensions variant the default

[alakazam@…]

Following #17989, I've continued trying to build octave-database ; I now encounter the following issue :

Undefined symbols:
  "_sqlite3_enable_load_extension", referenced from:
      _wrap_sqlite3_enable_load_extension(octave_value_list const&, int) in sqlite3_wrap.o
  "_sqlite3_load_extension", referenced from:
      _wrap_sqlite3_load_extension(octave_value_list const&, int) in sqlite3_wrap.o

Because of #126, octave-database cannot depend on sqlite3+loadable_extensions. Because of this, I would like to suggest that +loadable_extensions no longer be a variant for sqlite3, but that the loadable extension feature be enabled by default. It is indeed experimental according to the SQLite3 online documentation, but its status hasn't changed since 2006, and it seems that no major tickets on their tracking system have targeted this functionality in the pas, and that none are currently open.

[mww@…]

agreed -- I've removed the variant in favor of making loadable extensions available by default; the sqlite homepage states, that the interface is experimental and might be subject to change (though unlikely meanwhile, as it seems);

version 3.6.10, revision 1 is the 1st to be build like that;

[(none)]

Milestone Port Enhancements deleted