[Bug 2017840] Re: ifupdown resolved script has typo

[CH]

There's another similar typo in the /etc/network/if-up.d/resolved script, on line 71:
```
    if ! cmp --silent "$oldstate" "$newstate" 2>/dev/null; then
        DNS DNS6 DOMAINS DOMAINS6 DEFAULT_ROUTE
        # v4 first
```
Comment it out, as it's not valid code.

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https://bugs.launchpad.net/bugs/2017840

Title:
  ifupdown resolved script has typo

Status in systemd package in Ubuntu:
  New

Bug description:
  This error happens when you try to run ifup or ifdown:

  ```
  # ifdown enp3s0
  /etc/network/if-down.d/resolved: 12: mystatedir: not found

  # ifup enp3s0
  /etc/network/if-up.d/resolved: 12: mystatedir: not found
  ```

  Here's the first 12 lines of those scripts:
  ```
  # head -n 12 /etc/network/if-up.d/resolved

  #!/bin/sh
  #
  # Script fragment to make ifupdown supply DNS infromation to resolved
  #

  case "$ADDRFAM" in
      inet|inet6) : ;;
      *) exit 0 ;;
  esac

  if systemctl is-enabled systemd-resolved > /dev/null 2>&1; then
      mystatedir statedir ifindex interface
  ```

  I'm thinking that the word `local` used to appear before `mystatedir`
  on line 12, but that was when it was a function.  When it was
  converted back from being a function, the 'local' keyword was removed,
  but the variables remained.

  Either make it into a function again, or delete line 12.

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