Mark do-not-translate files

[alfsb]

Apply the new <?do-not-translate?> in doc-en files that are auto-generated, expected not translated, ot that not contains any translatable text.

In special, I would like to confirm/know:

• docbookcs.xml should not be copied on translatoins?
• en/appendices/license.xml is expected never translated.
• where is the code that generates en/reference/datetime/timezones.xml, this the generator outputs the <?do-not-translate?> mark.

Things I considered:

1. To remove the vi/vim comments and eof very small files, and from all version.xml files;

2. To remove the top comment, and leave only at start:

<?xml version="1.0" encoding="utf-8"?>
<?do-not-translate?>

There still about 200 /*/versions.xml files, that I will change, directly, if and after this PR is merged. Plan to merge it in one week, if there is no hard oppositions.

[alfsb]

Also, are there some other .xml files, besides versions.xml files, that I missed? I got this "list" from file exclusions of revcheck, that I expect is correct, but to be sure.

[jordikroon]

docbookcs.xml may be copied. It's up to the translator if they want this in as it could be useful for them.
And I added this marker to #5658 as well.

[alfsb]

Plan to merge this by friday, having a small cooldown from 5634.

[alfsb]

docbookcs.xml may be copied. It's up to the translator if they want this in as it could be useful for them. And I added this marker to #5658 as well.

Then it needs a <!-- $Revision$ --> line after XML decl, so translations have a place where to replace for the revtag, without disturbing line counts or creating long lines.

Also, can you add some other XML comment, poining for documentation or a fast/small tutorial, of where the file is used and how it could be changed in translations?

[alfsb]

Plan to merge this by next monday, and then after that, to mark all version.xml files. Last is to remove the ignore-by-name conventions in revcheck,