database/sql: link to driver wiki page
Fixes #5127
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/8011044
diff --git a/src/pkg/database/sql/sql.go b/src/pkg/database/sql/sql.go
index d1f929e..236e2c0 100644
--- a/src/pkg/database/sql/sql.go
+++ b/src/pkg/database/sql/sql.go
@@ -4,6 +4,9 @@
// Package sql provides a generic interface around SQL (or SQL-like)
// databases.
+//
+// The sql package must be used in conjunction with a database driver.
+// See http://golang.org/s/sqldrivers for a list of drivers.
package sql
import (
@@ -325,7 +328,9 @@
// database name and connection information.
//
// Most users will open a database via a driver-specific connection
-// helper function that returns a *DB.
+// helper function that returns a *DB. No database drivers are included
+// in the Go standard library. See http://golang.org/s/sqldrivers for
+// a list of third-party drivers.
//
// Open may just validate its arguments without creating a connection
// to the database. To verify that the data source name is valid, call
