Security update for samba

Open Source Vulnerabilities SUSE-SU-2017:2650-1

This update for samba fixes several issues. These security issues were fixed: - CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file, leaking information from the server to the client (bsc#1058624). - CVE-2017-12150: Always enforce smb signing when it is configured (bsc#1058622). - CVE-2017-12151: Keep required encryption across SMB3 dfs redirects (bsc#1058565). These non-security issues were fixed: - Fixed error where short name length was read as 2 bytes, should be 1 (bsc#1042419) - Fixed GUID string format on GetPrinter to prevent published printers from disappearing 7 (bsc#1050707). - Halt endless forest trust scan to prevent winbind from running out of memory (bsc#1044084).