some debug test to understant why windows has some problems to generate the reftable #2
some debug test to understant why windows has some problems to generate the reftable #3
some debug test to understant why windows has some problems to generate the reftable #4
some debug test to understant why windows has some problems to generate the reftable #5
fix cluster and bug report archive generation on other file system encoding than utf-8 (MS windows)