Added support for the SMB version SMB3_11 When the `min protocol = SMB3_11` in the smb.conf, the CIFS mount will return with the following error: ``` CIFS VFS: cifs_mount failed w/return code = -95 ``` added an optional option to use the `vers=3.11` Signed-off-by: Moayad Almalat <m.almalat@proxmox.com> Tested-by: Fabian Ebner <f.ebner@proxmox.com> [ Thomas: move text from cover letter to commit message & add S-o-b ] Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>