remove #ifndef MKNOD from ksh(1) and enforce pledge(2) on all codepaths

[Ricardo Mestre]

Hi tech@

Now that dpath annotation in pledge(2) is available then #ifndef MKNOD can be
removed and enforce pledge(2) on all codepaths, is this correct, comments?

Index: main.c
===================================================================
RCS file: /cvs/src/bin/ksh/main.c,v
retrieving revision 1.75
diff -u -p -u -r1.75 main.c
--- main.c      14 Dec 2015 13:59:42 -0000      1.75
+++ main.c      26 Dec 2015 18:23:34 -0000
@@ -154,13 +154,11 @@ main(int argc, char *argv[])
 
        kshname = argv[0];
 
-#ifndef MKNOD
-       if (pledge("stdio rpath wpath cpath fattr flock getpw proc exec tty",
+       if (pledge("stdio rpath wpath cpath dpath fattr flock getpw proc exec 
tty",
            NULL) == -1) {
                perror("pledge");
                exit(1);
        }
-#endif
 
        ainit(&aperm);          /* initialize permanent Area */