Fixed problems with the wxDb::Open(wxDb *copyDb) not copying in all the different...

Fixed problems with the wxDb::Open(wxDb *copyDb) not copying in all the different data types required values
Added Interbase database support based on contributions from Roger Gammans
Enabled the wxDb::TablePrivileges() function for v2.3/2.4
Fixed a bunch of problems with wxDb::TablePrivileges() not working correctly with all databases.
Added the ability to pass in a SCHEMA to wxDbTablePrivileges() that greatly improves the speed of the privileges lookup.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8768 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775