Significant string changes:
* completionpass_help, gradetopassnotset in mod_quiz - grade to pass set
in quiz settings not gradebook
* namecolumnmissing,core_cohort - fixing incorrect message about adding
users to a cohort
Significant string changes:
* publishstate_help, core_notes - including GDPR guidance
* contactdataprotectionofficer_desc, tool_dataprivacy - removing mention
of link on privacy policy page as it is not yet implemented
From now on, all English strings use the new syntax. They are not
eval()'ed any more and the only valid placeholders are {$a} and
{$a->foobar}. No extra quotes escaping, dollar sign escaping and putting
double percent signs.
The modified files were exported from AMOS database repository in the
new syntax and were re-ordered by stringid. Standard GNU/GPL and PHPdoc
blocks are added. Where there was no copyright note so far, I added the
default one with Martin Dougiamas as the copyright holder.
Live long and prosper.