[Samba] How to update from Samba4.0.0 alpha17 to beta8 and switch from ntvfs to s3fs

[X-Dimension at gmx.net]

We have a Samba4.0.0 alpha17 based server running with ntvfs in /usr/local/samba and want to update it to beta8 but with s3fs support enabled.

Samba4beta8 is installed in /var/lib/samba.

What steps must be done to update our server and switch from ntvfs to s3fs and also the samba directory from /usr/local/samba/ to /var/lib/samba?

Thanks for help! :)