Service-specific default locales

[Andrew Pantyukhin]

I need to run different services in different locales
(basically LANG/LC_ALL changed). Before I look at how
to implement it, is there any objection to
<name>_locale presetting the two variables to its
value (and possibly some error-checking via locale(1)?

As for a site-wide default, I currently have "export
LANG=en_US.UTF-8" in my rc.conf. Should we introduce
a general "locale" variable for this?

Thanks!