Also: - add support for block devices. - fix various memory leaks.
- Initial support for 9P2000.u protocol - Initial write support. - Switch from lists to hashtable for storing tags and fids - Make logging optional (dependent on compile-time constant) - Drain tags and fids on connection close.
- Use vectored I/O everywhere - Add routines to pretty-print 9P requests - Improve code style - Implement clunk request and so on.