Security update for samba (important)

This update for samba fixes the following issues:

The following security vulnerabilities were fixed:

• CVE-2018-1139: Disable NTLMv1 auth if smb.conf doesn’t allow it;
  (bsc#1095048)
• CVE-2018-1140: ldbsearch ‘(distinguishedName=abc)’ and DNS query with
  escapes crashes; (bsc#1095056)
• CVE-2018-10919: Confidential attribute disclosure via substring search;
  (bsc#1095057)
• CVE-2018-10858: smbc_urlencode helper function is a subject to buffer
  overflow; (bsc#1103411)
• CVE-2018-10918: Fix NULL ptr dereference in DsCrackNames on a user
  without a SPN; (bsc#1103414)

This update was imported from the SUSE:SLE-15:Update update project.