* New button allows to create standard issuer for nextcloud
* Since the endpoints url has to be https and nextcloud relys on the
baseurl to create the endpoints, the baseurl of issuers has now to be
https as well (or empty).
* Google's baseurl was changed to https (there was no reason not to),
whereas Facebook and Microsoft baseurls remain empty.
* In case of the creation of a nextcloud issuer, the baseurl is
required.
* Nextcloud requires the baseurl, therefore a parameter is added to
create_standard_issuer($type, $baseurl = false). That parameter not
required (or used) for anything but Nextcloud.
Significant string changes:
* errorinvalidbyhour,core_calendar - correcting number from 59 to 23
* cron_help,core_admin - updated recommendation to run cron every minute
* tour1_content_end, tour1_content_welcome, tour2_content_end,
tour2_content_welcome all in tool_usertours - removing reference to
3.2
* invalidsesskey,core_error and invalidsesskey,mod_wiki - more
understandable error message
* pluginname_help and pluginnamesummary in qtype_essay - explaining that
the question type can be used for file uploads
* formatnoinline, mustattach and mustrequire in qtype_essay - changing
the word 'inline' to 'online'