[ic] Forcing Interchange to use Berkely-DB instead of GDBM

[Chris Wenham]

 Is it possible to make Interchange user Berkely-DB instead of GDBM,
 even if it detects the presense of the GDBM library?

 We're having some trouble with the GDBM library on one of the
 machines we'd like to deploy Interchange on. We think it's probably
 because the version is too old, but since the machine is in a
 production setting we cannot just update the library since it could
 break something that depends on it. We'd like to at least see what
 the results are with the Berkley-DB format instead.

Regards,

Chris Wenham
NetMonger Communications