Set ApplicationPool session connections to non-blocking
Increase default mbuf chunk size to 2048, update documentation IDmaps
Optimize HashedStaticString default constructor
Add building blocks for turbocaching
Update changelog

[ci:skip]
Fix some indenting
Fix unit tests: make ApplicationPool session sockets blocking by default
Make FileBufferedChannel work when libeio is running on another thread's event loop
Make the internal HTTP server multithreaded