Initial implementation of the "sqlite_dbpage" virtual table.  Currently
it is read-only and has a place-holder xBestIndex.

FossilOrigin-Name: c2c1d656e3f52465192c2a697a976cd1837ccc4e10708a2377cff8bf6eaa7d49
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index a8f1bed..0cc435d 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -4400,6 +4400,9 @@
 int sqlite3ThreadJoin(SQLiteThread*, void**);
 #endif
 
+#if defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST)
+int sqlite3DbpageRegister(sqlite3*);
+#endif
 #if defined(SQLITE_ENABLE_DBSTAT_VTAB) || defined(SQLITE_TEST)
 int sqlite3DbstatRegister(sqlite3*);
 #endif