Add keepalives and prometheus integration

• protocol-9p-unix: add missing dependency on io-page.unix
• protocol-9p-unix: add optional periodic ping thread to keep connections alive
• protocol-9p-unix: add prometheus metrics integration

Faster build times release

• Update to lwt.3.0.0
• Switch build to jbuilder
• Split into 3 opam packages: protocol-9p, protocol-9p-unix, protocol-9p-tool
• The Unix modules are inside the Protocol_9p_unix module

Mirage 3 release

• Update to Mirage 3 APIs (114, @avsm and @samoht)

v0.8.0

v0.8.0 (2016-12-12)

• Add a max_fids optional argument to connect to set the maximal number
  of fids a client can open in parallel (the default remains 100).
  (#108. @samoht)

v0.7.4

v0.7.4 (2016-11-10)

• Protect flow reads from EPIPE exceptions (this can happens on Windows)
  (#104, @samoht)
• Log a message when FID pool is exhausted (#98, @talex5)
• Close socket if we get an error trying to connect (#97, @talex5)

Remove use of stringext in the CLI

The CLI optionally compiles if lambda-term is installed and now depends on astring rather than stringext.

v0.7.2

v0.7.2 (2016-07-15)

• fix more dependency issues in the META file

v0.7.1

v0.7.1 (2016-07-15)

• switch to topkg
• make protocol-9p.unix depends on io-page.unix to workaround an issue
  the channel implementation
• remove the dependency to stringext
• fix missing dependencies causing a compilation issue on 4.03

lots of bug fixes

• remove dependency on ctypes
• support named pipes on Win32
• report Win32 errors
• client: don't clunk the fid after remove
• client: deallocate_fid should clunk before markind fid as free
• client: remove: always mark the fid as free
• client: don't clunk a fid if walk fails
• server: fix deadlock on Eof which prevents connection cleanup
• use the channel module for buffered packet reading
• unix: don't allocate per request, use a per-connection 32KiB buffer

Add better Mirage and Windows support

• server: supply no exception converter by default
• dependency on lambda-term (for the shell) is now optional
• add support for Win32
• use logs library
• reject messages longer than 640 KiB