Git commits in Moodle 3.7.5 by Brendan Heywood

commit 867d9497f3b95e7b65464f9a9c187376d1710eff
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Fri, 07 Feb 2020 02:27:40 +0800
Tag:    v3.7.5

MDL-67726 tool_phpunit: add missing input escaping

commit 194406e923b34c86b68bac7ca82253c223316eb1
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Wed, 05 Feb 2020 20:14:39 +0800
Tag:    v3.7.5

MDL-67861 core: Added $CFG->reverseproxyignore IP subnet list

commit c4665bcf950eddcbd38678b19cf5e590baad3faf
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Wed, 05 Feb 2020 19:50:20 +0800
Tag:    v3.7.5

MDL-67861 libraries: Refactor is_ip_in_subnet_list in ip_utils

commit c70d7d0386640a218ede247aa61b5629549e4bf2
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Tue, 04 Feb 2020 14:03:47 +0800
Tag:    v3.7.5

MDL-67861 admin: Default $CFG->getremoteaddrconf to only use REMOTE_ADDR

commit 4a3a673d1ee03f243947e8dfd8e747e713e63350
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Tue, 04 Feb 2020 13:56:41 +0800
Tag:    v3.7.5

MDL-67861 core: Use last ip in X-Forwarded-For list

commit fd9466fceb030a359b8525ef24e358aa1bad13cd
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Wed, 01 Jan 2020 20:41:22 +0800
Tag:    v3.7.5

MDL-67486 cron: Improve throughput by holding cron lock for less time