Supported backends/overlays in 2.5

[Quanah Gibson-Mount <quanah@zimbra.com>]

For 2.5, it would be good to take a look at existing backends and overlays 
we ship as supported, and see if there are any we want to retire.  I think 
it would be nice as well to make it so people could configure in various 
contrib modules via configure flags, rather than the current manual make 
process.

I'll start with my thoughts:

backends:

I would like to see us retire slapd-bdb and slapd-hdb.  We first documented 
they were deprecated in March of 2013 and updated the man pages to 
officially note that in May of 2014.  Nearly 2 years have passed since 
then, and it'll likely be at least another year before 2.5 is production 
ready.  That's some 3 years.  In addtion, both slapd-bdb and slapd-hdb 
depend on BDB versions that are not supported by Oracle, and the source to 
which Oracle is doing its best to remove and make inaccessible.

Another possibility is back-perl.  back-sock is a better solution.  OTOH, 
We have gotten contributions fixing issues in it as recently as April 2015, 
so there may be folks using it who would like to see it continue.


overlays:

I'd like to see the passwd/sha2 overlay be considered for promotion. 
Having the ability to set strong hashes for passwords is crucial in todays 
world.

--Quanah

--

Quanah Gibson-Mount
Platform Architect
Zimbra, Inc.
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