s3-winbindd: Remove undocumented winbindd:socket dir parameter

s3-winbindd: Remove undocumented winbindd:socket dir parameter

This uses the documeted "winbindd socket directory" parameter instead.

This came about due to the merge of the two smb.conf tables in s3 and
s4 for the Samba 4.0 release.  The s4 code used a real parameter,
which caused this to be documented, whereas no automatic procedure
existed to notice the parametric option and the need to document that.
The fact that this was not used consistently in both codebases is one
of the many areas of technical debt we still need to pay off here.

Andrew Bartlett

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>