7daf790957
(1) MANLANG is now a list (defaulting to ""), so if you have English
and Japanese-EUC versions of the manpages, you can say something
like `MANLANG= "" ja_JP.EUC' and manpage compression will DTRT.
(2) Add new variables MAN%cPREFIX (where %c=[1-9LN]) which default to
MANPREFIX (which defaults to PREFIX), to specify per-section
prefixes. In particular, this handles the cases in many perl
ports, which install man1pages into man/man1 and man3pages into
lib/perl5/man/man3.
Note these modifications won't change the behavior of existing
variables used in previously-approved ways, so any Makefile that
worked before will still continue to work.