Security update for Samba (critical)

This update of Samba fixes a heap-based buffer overflow
that could be exploited by remote, unauthenticated
attackers to crash the smbd daemon or potentially execute
arbitrary code via specially crafted SMB AndX request
packets (CVE-2012-0870).

Also fixed two non security bugs:

• Fix to handle domain join using NetBIOS name; (bnc
  #633729).
• Fixed the DFS referral response for msdfs root;
  (bnc#703655).