Git commits in Moodle 3.5.5 by David Mudrák

commit 4c73fd62b09a98e1123ffbbe9965b5bacd3799c7
Author: David Mudrák <david@moodle.com>
Date:   Fri, 01 Mar 2019 02:58:41 +0800
Tag:    v3.5.5

MDL-64943 lang: Fix regression in the test caused by the reworded string

commit d5cdc97b2f7f0a9789679b5dc2d7857fe9abbc09
Author: David Mudrák <david@moodle.com>
Date:   Thu, 28 Feb 2019 20:35:35 +0800
Tag:    v3.5.5

MDL-64943 lang: Fix regressions in Behat caused by reworded strings

commit b14eb813a00c6b8976e8526ba47d510096b71a8c
Author: David Mudrák <david@moodle.com>
Date:   Thu, 31 Jan 2019 19:28:52 +0800
Tag:    v3.5.5

MDL-64737 editor_atto: Fix the privacy export_user_data() implementation

commit 7ed8b29579f6a9eaeea2075b53518a41a9994611
Author: David Mudrák <david@moodle.com>
Date:   Thu, 31 Jan 2019 18:31:57 +0800
Tag:    v3.5.5

MDL-64737 privacy: Fix privacy provider testsuite file names

commit f9d389f45b091004e411915388fea61a316d54d8
Author: David Mudrák <david@moodle.com>
Date:   Fri, 11 Jan 2019 18:01:46 +0800
Tag:    v3.5.5

MDL-64553 message: Add index for the notifications.useridfrom field

commit 8374e2db3fac344027507d0271ad1b262246d086
Author: David Mudrák <david@moodle.com>
Date:   Wed, 09 Jan 2019 03:03:06 +0800
Tag:    v3.5.5

MDL-64452 cache: Add tests for key prefix based on session id

commit c4f137749dff435538c484d12ebdd3ad26baf255
Author: David Mudrák <david@moodle.com>
Date:   Wed, 09 Jan 2019 02:23:59 +0800
Tag:    v3.5.5

MDL-64452 cache: Always use the current session id in the key prefix

commit 787991f1d401d2c244710faf71a32d01ed5fec8c
Author: David Mudrák <david@moodle.com>
Date:   Tue, 18 Dec 2018 04:03:58 +0800
Tag:    v3.5.5

MDL-64424 privacy: Use system context purpose on the front page, too