[CIFS] Make POSIX CIFS Extensions SetFSInfo match exactly what we want

not just the posix path feature.

Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --cc fs/cifs/README
Simple merge

diff --cc fs/cifs/cifspdu.h
Simple merge

diff --cc fs/cifs/connect.c
Simple merge

diff --cc fs/cifs/file.c
Simple merge