-nsscash has an extensive test suite for both the Go and C part testing general
-requirements and various corner cases.
+Nsscash has an extensive test suite for both the Go and C part testing general
+requirements and various corner cases. See TODO.adoc for a list of known
+issues and possible improvements.
+
+Nsscash was created as replacement for nsscache [1] because nsscache has very
+complex code, especially the parts written in C, uses multiple files for data
+and indices and has had severe bugs (including temporary loss of all users and
+race conditions when updating data and index files).