nls support

[Frédéric Fauberteau <triaxx%NetBSD.org@localhost>]

Hi folks,

I found 1015 packages that contains files in share/locale, approximately 
5% of our packages:
$ find pkgsrc/ -type f -name PLIST -exec grep -q "share/locale" '{}' \; 
-print | wc -l
1015

There are apparently 35 packages that provide nls option enabled by 
default:
$ grep -r "PKG_SUGGESTED_OPTIONS.*nls" * | wc -l
35

And apparently 28 packages that provide this option disabled by default:
$ grep -r "PKG_SUPPORTED_OPTIONS.*nls" * | wc -l
28

I am personally in favour of adding a nls option to packages that 
provide localization file because it moves stuffs like LDFLAGS.FooOS+= 
-lintl or CONFIGURE_ENV+= gt_cv_func_gnugettextX_libintl=yes out of the 
Makefile and it makes it clearer. If every localized packages have a nls 
option, we could choose a policy: either (i) nls is in 
PKG_SUPPORTED_OPTIONS or nls (ii) is in PKG_SUGGESTED_OPTIONS. I prefer 
(i) for my servers and (ii) for my desktop, then I have no strong 
opinion on what should be a default policy.

I would like to know the opinion of the community. Should we offer set 
of packages that are properly localized by default or not?