Git commits in Moodle 2.7.1 by Petr Skoda

commit a31fdfb145b98ac228838bea300f9b5e7da64d2c
Author: Petr Skoda <petr.skoda@totaralms.com>
Date:   Fri, 04 Jul 2014 12:28:59 +0800
Tag:    v2.7.1

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

commit 2d7617aa186e2db567f42b8e8caaf5d8b6fbc8b2
Author: Petr Skoda <petr.skoda@totaralms.com>
Date:   Fri, 04 Jul 2014 11:04:50 +0800
Tag:    v2.7.1

MDL-45945 mssql: force default database collation in all tables including temp table

commit df9a669791e9c1f21069b9dd804a4d4ee1f09cd7
Author: Petr Skoda <petr.skoda@totaralms.com>
Date:   Tue, 24 Jun 2014 06:48:28 +0800
Tag:    v2.7.1

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