/ Changes On Branch sqlite_stat4

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Changes In Branch sqlite_stat4 Excluding Merge-Ins

This is equivalent to a diff from f2d175f975 to f86b75b6c7

Merge the STAT4 capability into trunk. (check-in: a32af0abe5 user: drh tags: trunk)
Adjustments to #ifdefs in analyze.c to all a clean compile with no extra code with both ENABLE_STAT3 and ENABLE_STAT4 and with neither. (Closed-Leaf check-in: f86b75b6c7 user: drh tags: sqlite_stat4)
Add the cache_spill pragma. Change the fullfsync and checkpoint_fullfsync pragmas to apply to all attached databases. (check-in: 65a85a156f user: drh tags: trunk)
Add the cache_spill pragma. (check-in: cdb181c04f user: drh tags: cache_spill)
Add a test for the problem fixed by [91733bc485]. (check-in: 5c59110481 user: dan tags: sqlite_stat4)
Merge recent trunk changes into the STAT4 branch. (check-in: c69b512af2 user: drh tags: sqlite_stat4)
Make sure that GROUP BY terms select input column names in preference to output column names, in compliance with the SQL standard. Ticket [1c69be2dafc28]. (check-in: f2d175f975 user: drh tags: trunk)
Bare identifiers in ORDER BY clauses bind more tightly to output column name, but identifiers in expressions bind more tightly to input column names. This is a compromise between SQL92 and SQL99 behavior and is what PostgreSQL and MS-SQL do. Ticket [f617ea3125e9c]. (check-in: c78b357c00 user: drh tags: trunk)

Changes to src/alter.c.

Changes to src/analyze.c.

Changes to src/btree.c.

Changes to src/build.c.

Changes to src/ctime.c.

Changes to src/func.c.

Changes to src/shell.c.

Changes to src/sqliteInt.h.

Changes to src/test_config.c.

Changes to src/test_func.c.

Changes to src/update.c.

Changes to src/utf.c.

Changes to src/vdbe.c.

Changes to src/vdbemem.c.

Changes to src/where.c.

Changes to test/alter.test.

Changes to test/alter4.test.

Changes to test/analyze.test.

Changes to test/analyze3.test.

Changes to test/analyze5.test.

Changes to test/analyze6.test.

Changes to test/analyze7.test.

Changes to test/analyze8.test.

Added test/analyze9.test.

Added test/analyzeA.test.

Changes to test/auth.test.

Changes to test/dbstatus.test.

Changes to test/index6.test.

Changes to test/mallocA.test.

Changes to test/permutations.test.

Changes to test/table.test.

Changes to test/tkt-cbd054fa6b.test.

Changes to test/where9.test.

Changes to test/wild001.test.