install strfile and unstr (and what is HOSTPROG?)

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

(Bcc'd netbsd-docs.)

NetBSD includes the strfile(8) and unstr(8) manual page. But these tools 
aren't installed.

Okay if these are installed? If not, lets remove the manual pages.

src/games/fortune/strfile/Makefile has HOSTPROG=strfile (instead of 
PROG=strfile). I think that is what keeps it from installing.

Where is HOSTPROG documented? If this changed to PROG will it break 
cross-compiles?

Installing unstr will probably be done by simply adding to the 
SUBDIR in src/games/fortune/Makefile.