Add the SQLITE_TESTCTRL_PRNG_SEED test control.

FossilOrigin-Name: 3ac5723164ae801e209ce525a5d94692767136f9d06be2a84883dcea677d02da
diff --git a/src/main.c b/src/main.c
index 6127006..81a76aa 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3824,13 +3824,13 @@
       break;
     }
 
-    /*
-    ** Reset the PRNG back to its uninitialized state.  The next call
-    ** to sqlite3_randomness() will reseed the PRNG using a single call
-    ** to the xRandomness method of the default VFS.
+    /*  sqlite3_test_control(SQLITE_TESTCTRL_PRNG_SEED, unsigned int);
+    **
+    ** Use the integer value as the seed for SQLite's internal PRNG.
+    ** rather than the VFS xRandomness() function.
     */
-    case SQLITE_TESTCTRL_PRNG_RESET: {
-      sqlite3_randomness(0,0);
+    case SQLITE_TESTCTRL_PRNG_SEED: {
+      sqlite3Config.iPrngSeed = va_arg(ap, unsigned int);
       break;
     }