Patch for DotNet Provider 1.7 to connect against Firebird 2.1

Attached is a patch file ( a ZIP file with extension changed , you should rename it from piz to zip ) with
changes to allow v1.7 of the provider to connect against Firebird 2.1,
changes has been done by backporting 2.5 svn sources to the v1.7 sources.

[ED: soon there will be an v1.7 release that will integrate this patch]