Re: misc/57877: /etc/mtree/set.* is not automatically tested and doesn't always match installation

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

Amazingly, only two files are troublesome in these tests, according to
the i386 testbed:

https://releng.netbsd.org/b5reports/i386/2024/2024.01.25.19.12.49/test.html#usr.bin_mtree_t_sets_set_base

   check_mtree
   Fail: incorrect exit status: 2, expected: 0
   stdout:
   dev/pts: 
           permissions (0755, 0555)
   ./var/run/named missing

   stderr:

I think we can just:

1. fix the permissions on dev/pts in src/etc/NetBSD.dist.base, since
   it never makes sense for userland to write to files here --
   /dev/pts is always intended to have ptyfs mounted; and

2. delete var/run/named from src/etc/NetBSD.dist.base, since it gets
   deleted on every boot by rc.d/clearcritlocal (which is presumably
   why it's reported missing here), so anything that relies on
   /var/run/named at boot has to recreate it anyway.


P.S.  OOPS: mtree lives at /usr/sbin/mtree, so this test should have
      been put at tests/usr.sbin/mtree, not tests/usr.bin/mtree.