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Use RFC 5737 IP addresses and RFC 2606 domain names in all
unittests, docs, qa and docstrings.
Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Support IPv6 configuration for 'drbdsetup show' parser and add unittests
concerning that case. Renames some data files to use consistent names
clarifying their usage.
Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

DRBD 8.3 changes two more things compared to 8.2:
  - /proc/drbd format changed in multiple ways; the part we're
    interested is the ‘st:’ to ‘ro:‘ change (in the changelog named as
    “Renamed 'state' to 'role'”
  - “drbdsetup /dev/drbdN show” changed the ‘device’ stanza from:
      device "/dev/drbd0";
    to:
      device                  minor 0;

This patch fixes these both and adds data files and unittests for DRBD
8.3.1.
Signed-off-by: Iustin Pop <iustin@google.com>

This patch changes the bdev.DRBD8._GetDevInfo to take a string instead
of a minor, separates the `drbdsetup show` invocation into a new
separate method (bdev.DRBD8._GetShowData) and modifies the rest of the
DRBD8 class to make the appropriate calls.

It also adds a unittest script and data files for testing various cases
of device output.

Reviewed-by: imsnah