nls: add functions which take translations to be used

Add the following three functions to most of the commands.

setlocale (LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);

Reference: http://www.freelists.org/post/procps/backporting,1
Reported-by: Jim Warner <james.warner@comcast.net>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

skill.c

@@ -363,6 +363,10 @@ static void __attribute__ ((__noreturn__))
 		{NULL, 0, NULL, 0}
 	};
 
+	setlocale (LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+
 	if (argc < 2)
 		kill_usage(stderr);