Security update for samba (important)

This update for the samba server fixes the following issues:

Security issue fixed:

• CVE-2015-7560: Getting and setting Windows ACLs on symlinks can change
  permissions on link target; (bso#11648); (bsc#968222).

Other bugs fixed:

• Enable clustering (CTDB) support; (bsc#966271).
• s3: smbd: Fix timestamp rounding inside SMB2 create; (bso#11703);
  (bsc#964023).
• vfs_fruit: Fix renaming directories with open files; (bso#11065).
• Fix MacOS finder error 36 when copying folder to Samba; (bso#11347).
• s3:smbd/oplock: Obey kernel oplock setting when releasing oplocks;
  (bso#11400).
• Fix copying files with vfs_fruit when using vfs_streams_xattr without
  stream prefix and type suffix; (bso#11466).
• s3:libsmb: Correctly initialize the list head when keeping a list of
  primary followed by DFS connections; (bso#11624).
• Reduce the memory footprint of empty string options; (bso#11625).
• lib/async_req: Do not install async_connect_send_test; (bso#11639).
• docs: Fix typos in man vfs_gpfs; (bso#11641).
• smbd: make "hide dot files" option work with "store dos attributes =
  yes"; (bso#11645).
• smbcacls: Fix uninitialized variable; (bso#11682).
• s3:smbd: Ignore initial allocation size for directory creation;
  (bso#11684).
• Add quotes around path of update-apparmor-samba-profile; (bsc#962177).
• Prevent access denied if the share path is "/"; (bso#11647);
  (bsc#960249).
• Ensure samlogon fallback requests are rerouted after kerberos failure;
  (bsc#953972).
• samba: winbind crash -> netlogon_creds_client_authenticator; (bsc#953972)