[Pkg-samba-maint] Bug#675906: ditto

[Josip Rodin]

FWIW I can't remember a dist-upgrade of a samba server in my life where
smb.conf changes weren't a very annoying distraction...

It seems that whenever you have anything within the global section of
smb.conf, like domain membership or log level or any number of assorted
similar settings, it lists that in the diff as something to be removed.

It also doesn't seem to like shares commented out, saw a lot of that in the
diffs slated for removal, too.

And just executing the 3-way merge seems to inevitably lead to the removal
of all local settings en masse, and then there's no backup file for them.
(This might be a generic ucf thing, which is probably why that option is
marked experimental?)

Using a .d subdirectory to farm out settings into more manageable hunks
isn't really a hack these days, it's SOP to avoid having sysadmins go
berserk when doing upgrades.

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