Fixes needed to make DB2 and Firebird tests to run.
Removed log_stream class and moved its features to session class. It doesn't make sense to be with the logging logic in core.
Added support to statement::get_last_parameters. No performance penalty if not called. Shares most of the parameter logging logic.
Small fixes in parameter logging support.
Tabs to spaces.
Tabs to 4 spaces
Option to disable vector values expansion during query parameter logging/reporting.