Notification of string changes

Author: Helen Foster
MDL-60449 lang: Merge English strings from the en_fix language pack
Significant string changes:

* errorretrievingkey in message_airnotifier - improved wording and
removing reference to Moodle.org
* enddate_help and courseduration_desc in core - clearer wording
explaining what the date actually does
* restore:viewautomatedfilearea in core_role - changing wording to match
the behaviour
* dropzones_help in qtype_ddmarker - improved wording
* autologinkeygenerationlockout in tool_mobile - updated error message
* configallowemailaddresses in core_admin - clearer description
* subscriptionmode_helpin mod_forum - removing misleading sentence about
subscription mode changes not affecting existing users


http://git.moodle.org/gw?p=moodle.git;a=commit;h=a57c2774e8da2c220fc1717fda28486725509c2d
http://github.com/moodle/moodle/commit/a57c2774e8da2c220fc1717fda28486725509c2d

+ 3.2 en [autologinkeygenerationlockout,tool_mobile]
+ 3.2 en [configallowemailaddresses,core_admin]
+ 3.2 en [error7022,core_mnet]
+ 3.2 en [enddate_help,core]
+ 3.2 en [courseduration_desc,core]
+ 3.2 en [restore:viewautomatedfilearea,core_role]
+ 3.2 en [errorretrievingkey,message_airnotifier]