The huge difference in the package change log indeed was caused by the
parallel development of Samba 3 and 4.

- BuildRequire pyldb-devel.
- Add libnetapi0 and samba-libs to baselibs.conf.
- Update to 4.0.9.
+ Fix crash of Winbind after "ls -l /usr/local/samba/var/locks/sysvol";
(bso#9820).
+ s3-lib: Fix segmentation fault while reading incomplete session info;
(bso#10003).
+ smbd: Fix a 100% loop at shutdown time; (bso#10013).
+ Windows 8 Roaming profiles fail; (bso#9678).
+ Add UPN enumeration to passdb internal API; (bso#9779).
+ smbd: Cleanup disonnected durable handles; (bso#9930).
+ vfs_streams_xattr: Do not attempt to write empty attribute twice;
(bso#9970).
+ Fix Windows error 0x800700FE when copying files with xattr names
containing ":"; (bso#9992).
+ s3-winbind: Do not delete an existing valid credential cache; (bso#9994).
+ Fix excessive RID allocation; (bso#10014).
+ Add debugclass for DNS server; (bso#10015).
+ Fix/improve debug options; (bso#10015).
+ Allow to change the default location for Kerberos credential caches;
(bso#10043).
+ Linux kernel oplock breaks can miss signals; (bso#10064).
+ net ads join: Fix segmentation fault in
create_local_private_krb5_conf_for_domain; (bso#10073).