[Drbd-dev] drbdsetup legacy utils can't fall back to version 8.3

[Lionel Sausin <ls@numerigraphe.com>]

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Dear DRBD developers,

Ubuntu 12.04 has several kernel users can choose from, some with DRBD 
8.3 and others with 8.4.
To address this, they have just deployed the drbd utils v8.4.3 with 
"--with-legacy_utils".
This works fine for drbdadm but drbdsetup seems to not revert to the 
legacy version, even though drbdsetup is built and deployed to 
/lib/drbd/drbdsetup-83:
     # /sbin/drbdsetup show 1
     Could not connect to 'drbd' generic netlink family

     # /lib/drbd/drbdsetup-83 show 1
     disk {
         size                0s _is_default; # bytes
     ...
     }

 From my (quick) reading of the source code, drbdadmin works because it 
adds /lib/drbd to the path using add_lib_drbd_to_path(), and drbdsetup 
seems not to.
Is the correct fix to add a symlink from /lib/drbd/drbdsetup-83 to 
/sbin, or should drbdsetup be patched to search in /lib/drbd too?

Thanks in advance,
Lionel Sausin.

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