With IANA TZDB (timezone database) release 2022b, Europe/Kiev
has been renamed to Europe/Kyiv. So we need to add this string
to our list to keep tests passing.
Note that the old Europe/Kiev continues working (is an alias) and,
also, there are places in core where we are using it. Just we cannot
remove/replace those uses in core until we ensure that everybody is
using PHP 8.0.23 (TZDB 2022b) or more recent versions. Hence,
not changing those uses now.
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.
