Theses release fix a long-standing bug where the original PID
file is not restored when rolling back from a USR2 upgrade.
Presumably most upgrades aren’t rolled back, so it took over a
year to notice this issue. Thanks to Lawrence P. for
discovering and reporting this issue.
Unicorn is an HTTP server for Rack applications designed to only serve
fast clients on low-latency, high-bandwidth connections and take
advantage of features in Unix/Unix-like kernels. Slow clients should
only be served by placing a reverse proxy capable of fully buffering
both the the request and response in between Unicorn and slow clients.