The `socket options` directive does not need to be specified in
`smb.conf`. I think I copied it from an example many years ago, and
never bothered to remove it. It is definitely not required, most likely
not helping performance at all, and most likely hindering it.
The *samba* role provides general configuration for Samba. Other roles
will provide configuration for specific features such as Active
Directory membership, file shares, etc.
