Do not allow direct access to internal-use SQL functions such as

sqlite_rename_column() and sqlite3_rename_table() except when the
new SQLITE_TESTCTRL_INTERNAL_FUNCTIONS flag is set.

FossilOrigin-Name: 6e1330545e7b74fe5f1f20751a3425e2788441485fc07fcb7626e448c72027ce

src/global.c

@@ -240,6 +240,7 @@ SQLITE_WSD struct Sqlite3Config sqlite3Config = {
    0,                         /* xTestCallback */
 #endif
    0,                         /* bLocaltimeFault */
+   0,                         /* bInternalFunctions */
    0x7ffffffe,                /* iOnceResetThreshold */
    SQLITE_DEFAULT_SORTERREF_SIZE   /* szSorterRef */
 };