version 2.2.3 release v2.2.3: remove unused NseConnection module nsett.py had no callers anywhere in pysen itself (no project.scripts entry, no imports outside its own two ad-hoc misc/ driver scripts, no test/ coverage) -- its only real consumer is the separate bl15-nse-control package's NseControl. Removed the module along with misc/test_nsett.py, misc/test_pythia.py, and the now-moot doc/nsett-socket-review.md, after first fixing the two socket bugs it documented (missing TCP line reassembly, busy-loop on EOF). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>