groff in ch6 always uses prefix PAGE=letter

[brar@…]

The book (ch6/groff) tells us: Groff expects the environment variable PAGE to contain the default paper size. For those in the United States, the command below is appropriate. If you live elsewhere, you may want to change PAGE=letter to PAGE=A4.

I think this should be a configureable option for nALFS-Profiles. currently it is: <configure>

<prefix>PAGE=letter</prefix> <param>--prefix=/usr</param>

</configure>

I'd prefer: <configure>

<prefix>PAGE=&paper_size;</prefix> <param>--prefix=/usr</param>

</configure>

and something like: <!-- Groff expects the environment variable PAGE to contain the default paper size.

For those in the United States, this would be 'letter'. If you live elsewhere, it could also be 'A4'. -->

<!ENTITY paper_size "A4">

in config/general.ent

This would make us "Old-Europeans" find and edit this option without going through the whole xml-sources.

Regards, Brar