Add the SQLITE_CONFIG_PMASZ start-time option.

FossilOrigin-Name: acb0d1e8324f19da3d4d577d58748848de1bcef7

src/sqliteInt.h

@@ -2839,6 +2839,7 @@ struct Sqlite3Config {
   int nPage;                        /* Number of pages in pPage[] */
   int mxParserStack;                /* maximum depth of the parser stack */
   int sharedCacheEnabled;           /* true if shared-cache mode enabled */
+  u32 szPma;                        /* Maximum Sorter PMA size */
   /* The above might be initialized to non-zero.  The following need to always
   ** initially be zero, however. */
   int isInit;                       /* True after initialization has finished */