[Bug 1310531] [NEW] link-local addresses should configure a link scope instead of global scope

[Lekensteyn]

Public bug reported:

When NetworkManager is configured to assign a link-local IPv4 address to an
interface, it ends up with a global scope. This happens in two cases:

 - Configure method=link-local
 - Configure method=manual, addresses1=169.254.x.x;16:0.0.0.0

$ ip link show dev <iface>  # for both methods
    inet 169.254.x.y/16 brd 169.254.255.255 scope global <iface>
       valid_lft forever preferred_lft forever

Expected output:
    inet 169.254.x.y/16 brd 169.254.255.255 scope link <iface>
       valid_lft forever preferred_lft forever

This behavior causes conflicts with two network interfaces having the same
_link-local_ address.

** Affects: network-manager
     Importance: Unknown
         Status: Unknown

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New

** Bug watch added: GNOME Bug Tracker #728595
   https://bugzilla.gnome.org/show_bug.cgi?id=728595

** Also affects: network-manager via
   https://bugzilla.gnome.org/show_bug.cgi?id=728595
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1310531

Title:
  link-local addresses should configure a link scope instead of global
  scope

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