Git commits in Moodle 2.6.4 by Petr Skoda

commit 37648d141f3eb7034fd5c82f0fd8be67e2373f8f
Author: Petr Skoda <petr.skoda@totaralms.com>
Date:   Fri, 04 Jul 2014 12:28:59 +0800
Tag:    v2.6.4

MDL-46126 upgrade: fix bogus nulls in user.password before changing precission

commit d0dd8d33bb5a2dfab8f07660e05b257b04651893
Author: Petr Skoda <petr.skoda@totaralms.com>
Date:   Tue, 24 Jun 2014 06:48:28 +0800
Tag:    v2.6.4

MDL-46099 session: fix use of references for session globals