MDL-14679 fixing obsolete driver names in comments

lib/dml/mssql_native_moodle_database.php

@@ -64,7 +64,7 @@ class mssql_native_moodle_database extends moodle_database {
     /**
      * Returns more specific database driver type
      * Note: can be used before connect()
-     * @return string db type mysql, pgsql, postgres7
+     * @return string db type mysqli, pgsql, oci, mssql, sqlsrv
      */
     protected function get_dbtype() {
         return 'mssql';

lib/dml/mysqli_native_moodle_database.php

@@ -101,7 +101,7 @@ class mysqli_native_moodle_database extends moodle_database {
     /**
      * Returns more specific database driver type
      * Note: can be used before connect()
-     * @return string db type mysql, mysqli, postgres7
+     * @return string db type mysqli, pgsql, oci, mssql, sqlsrv
      */
     protected function get_dbtype() {
         return 'mysqli';

lib/dml/oci_native_moodle_database.php

@@ -74,7 +74,7 @@ class oci_native_moodle_database extends moodle_database {
     /**
      * Returns more specific database driver type
      * Note: can be used before connect()
-     * @return string db type mysql, oci, postgres7
+     * @return string db type mysqli, pgsql, oci, mssql, sqlsrv
      */
     protected function get_dbtype() {
         return 'oci';

lib/dml/pgsql_native_moodle_database.php

@@ -65,7 +65,7 @@ class pgsql_native_moodle_database extends moodle_database {
     /**
      * Returns more specific database driver type
      * Note: can be used before connect()
-     * @return string db type mysql, pgsql, postgres7
+     * @return string db type mysqli, pgsql, oci, mssql, sqlsrv
      */
     protected function get_dbtype() {
         return 'pgsql';

lib/dml/sqlite3_pdo_moodle_database.php

@@ -58,7 +58,7 @@ class sqlite3_pdo_moodle_database extends pdo_moodle_database {
     /**
      * Returns more specific database driver type
      * Note: can be used before connect()
-     * @return string db type mysql, mysqli, postgres7
+     * @return string db type mysqli, pgsql, oci, mssql, sqlsrv
      */
     protected function get_dbtype() {
         return 'sqlite3';

lib/dml/sqlsrv_native_moodle_database.php

@@ -75,7 +75,7 @@ class sqlsrv_native_moodle_database extends moodle_database {
    /**
      * Returns more specific database driver type
      * Note: can be used before connect()
-     * @return string db type mysql, pgsql, postgres7, mssql, sqlsrv
+     * @return string db type mysqli, pgsql, oci, mssql, sqlsrv
      */
     protected function get_dbtype() {
         return 'sqlsrv';