Allow overriding of translations about translate

[dwaynebailey]

Some other ideas of what data or structure we would need:
- Can specify file and location of string
- Can specify a version. Ie >m134 etc or v1 only. This allows us to have one
file in the package that covers everything
- Have a system file and allow a user to augment or override it
- Allow wildcard exclusions. This would allow eg exclusion of whole of
helpcontent2 from OOo. Or exclusion based on entry name eg. *.key in Mozilla.

[dwaynebailey]

I have found some others that you probably want to be able to exlude or mark as
configuration entries:
- *.width
- *.height
- *.size
- Items that contains only a URL
- One character wide items (most of these are *.key) but others are eg ‘%’
- Pure space ie there are only tab or space characters in the msgid
- Variables, space and punc. Items that contain only those three eg ‘%S = %S’
- regex eg ‘VK_F[0-3]+’ in Mozilla to eliminate all keyboard commandkeys

Notes on command keys, they are called
- *.key
- *.commandkey and *.commanKey
- *.commandkey2

[dwaynebailey]

I think a better option would be to get some new syntax into the upstream
Mozilla DTD and .properties files. Currently they have DONT_TRANSLATE entries.

If they added CONFIG entries we would at least know what to do with it. If we
had something like:

CONFIG (true|false) then we could even check for valid values.

I’m marking this for addressing LATER as I think we need to get Mozilla involved
in this.

[dwaynebailey]

This Mozilla bug is a request to add config information:
https://bugzilla.mozilla.org/show_bug.cgi?id=331438