[Samba] Upgrade of Samba from 4.4.6 to 4.5.4

[Thomas Schulz]

When Samba goes up a more major version (such as from 4.4.* to 4.5.*),
they sometimes rearrange what files go in what directories. The best way
to avoid trouble is to clean out the old version before installing the
new one. If you build Samba to be installed in something like /usr/local
then it is easy to remove the old files before installing the new ones.
If you build Samba to go into the system directories than this clean out
becomes harder. If you build it to go into /usr/local/samba4 then you can
easily clean out the lib directory, which is where most of the
rearranging happens.

Tom Schulz
Applied Dynamics Intl.
schulz at adi.com