[Samba] symlink in a share

[Pisch Tamás]

Hi,

I wanted to use a symlink in a share, but it didn't work. I tried it
on Samba 4.10. I thought that
follow symlinks = yes
is enough (and it is default). I googled about it, and found a solution:
unix extensions = no
in the global section, and
wide links = Yes
follow symlinks = yes
in the shares' section. According to the man,
unix extensions = yes
is the default, but the
samba-tool testparm -s smb.conf.master
output didn't include the
unix extensions = no
option. After I inserted it into the smb.conf, and reloaded Samba, I
could step into the symlinked directory.

smb.conf:
[global]
bind interfaces only = Yes
dos charset = CP852
interfaces = lo eth0
log file = /var/log/samba/%m.log
log level = 0 acls:3
logon path = ""
name resolve order = lmhosts host bcast
realm = A.B.HU
security = ADS
template homedir = /home/%D/users/%U
template shell = /bin/bash
unix charset = UTF8
username map = /etc/samba/user.map
workgroup = A
idmap config a : range = 10000-999999
idmap config a : backend = rid
idmap config * : range = 3000-7999
idmap config * : backend = tdb
csc policy = disable
map acl inherit = Yes
store dos attributes = Yes
vfs objects = acl_xattr
unix extensions = no

[share]
browseable = No
path = /path/to/share
read only = No
wide links = Yes

So, if
unix extensions = yes
is the default, then samba-tool makes mistake, if the default is no,
then the manual is wrong.
What is the difference between wide links, and follow symlinks?