Version 1.4g
- Make sure to clear alarm handler when interrupted by signal
  (diagnosed by and patch from Jeff Forys). In retrospect this
  issue was reported by a number of people.
- Note -M as optional in README, to match usage output and man page. 
  (Vladimir Panteleev)
- Add -J to SSH option string (Matt Stancliff)
- Typo "then"->"than" and add datarootdir to Makefile.in 
  (Stig-??rjan Smelror)
- More correct checking that we have a monitor port and remote
  host. (Vladimir D. Seleznev)

Version 1.4f
- Change behaviour when ssh child exits on signal. Previously
  if SIGHUP, SIGTERM, or SIGKILL were used, autossh assumed that
  it also was meant to exit. But it is possible that ssh was
  killed because it had hung up or was unresponsive for some
  reason. Restarting it is probably the better course.
- Fix order of arguments to kill(). Bug reported by Dapeng Gao.
- Ignore SIGPIPE. Issue noted and debugged by Rick van der Zwet.
- Note use of ExitOnForwardFailure and ClientAliveInterval in
  README and man page (Till Maas).
- Should accept the default -1 with AUTOSSH_MAXSTART. Reported by
  Daniel Hahler.
- Restart ssh when ssh exits with 2, which it can do if
  setting up tunnel fails due to race with remote end
  tearing down. (Daniel Sutcliffe).
- Daniel Hahler and Jindrich Makovich both reported that signals
  will have no effect if before ssh started (sleeping in gatetime,
  etc.) Signal handling is now set just just before monitoring the
  child, and unset just after.
- Makefile should use LDFLAGS (Waldemar Brodkorb).
- memset() sigaction structure before use.

Version 1.4e
- By default, changing the poll time should change the first poll
  time to match. Only have different times if AUTOSSH_FIRST_POLL
  is explicitly set. Jerry Xie forwarded on change request from
  Ubuntu bug forums.

Version 1.4d

- call daemon() before opening any sockets. Problem discovered and
  diagnosed by Frank van der Aa when trying to start autossh at
  system init.
- don't use malloc(n * size) idiom; use calloc()

Version 1.4c

- updated option string up to OpenSSH 5.6
- when using -f, set gate_time to 0; the assumption is that
  it is being used for infrastructure (i.e. in a system startup),
  has been tested, and bombing out just because the remote end is
  not up is not the desired behaviour.
- add patch from Thorsten Glaser for configure, fixes misplaced
  parenthesis and check for __progname.

Version 1.4b

- add AUTOSSH_MAXLIFETIME (patch from Steven Clark)
- include configure.ac in package
- fix poll flags so not checking for writable when write done (patch
  from John Grahor)
- compile time TOUCH_PIDFILE option to touch pid file on connection test.

Version 1.4a

- fix up pid file generation (Xander Hudson)
- fix up Makefile.in (Andrew Schulman)

Version 1.4

- initialise ep in main() to avoid warning (Marcelo Goes)
- fix where cast to int happens when calculating next time to poll
  connection (Omer Erdem Demir)
- fix '--' use so can pass -M to autossh for session multiplexing
- fix use of strcpy for overlapping copy in strip_arg (Filippo Giunchedi).
- add basic GNU autoconf support and drop per-platform Makefiles (Andre Lucas)
- pid file support (Ben Vitale)
- arbitrary messages in echo string (Ron Yorston)

Version 1.3

- fix AUTOSSH_DEBUG for Solaris and AIX
- fix attempt to free() static storage (affected platforms without 
  getaddrinfo() -- mostly cygwin) (Andrew Schulman)
- change test and placement of typedef for socklen_t under OS X; new
  OS X defines it
- add ability to signal autossh to kill and restart ssh child, using
  SIGUSR1
- add hostname to monitor message (Ron Yorston)
- check on looping on poll() where connection has been lost (spinning
  and high CPU)
- fix bug where length argument to accept() was not initialised
- fix arg parsing bug where stripping -f from arguments would strip
  from a parameter to the argument: e.g -L8808:foo:80 would become
  -L8808:oo:80 (pointed out by Eric Larson)
- pull out r/w loops in conn_test() into separate functions, makes
  logic more apparent
- add echo port support: have the remote server use the inetd
  echo service to echo our test string back to us. Or use some other
  echo service. Idea and patch from Ron Yorston. This makes it 1.3.
- remove bad strcpy() (left over from some testing?) thanks to Ron
  Yorston, change to memset read buffer to all zeros
- fix ssh args when AUTOSSH_PORT=0 is used to turn monitor loop off
  (Karl Berry)
- add more descriptive usage output, by popular request

Version 1.2g

- add AUTOSSH_NTSERVICE (Andrew Schulman)
- fix bad calculation for seconds left in poll time (again from
  Andrew Schulman)
- from Andrew Schulman: add support for older networking and cygwin
- add AUTOSSH_MAXSTART (from Hugo Haas)
- loop around waitpid() in ssh_kill() in case interrupted (thanks to
  Jens Krabbenhoeft)
- update ssh argument string
- move openlog above port error checking
- handle environment variables and -M arg being set to the
  empty string (reported by Dan Christensen via Filippo Giunche)
- add some rudimetary auto-adjust to the network timeouts for
  low poll times. So by default 15secs on each of accept() and 
  poll()to deal with high-latency connections, but as poll time 
  falls below 30secs, then adjust timeouts down as well.
- adjust division in grace_time() to allow for low poll time
- don't call shutdown() and close() on invalid socket ()
  (found by Dmitry V. Levin)

Version 1.2f

- by popular request, support the -f flag by doing the fork/background 
  ourselves, and not passing the flag to ssh (thanks to Dan Christensen
  for prodding me into it)
- change timeout to from 5000 to 15000 ms to deal with reported issues
  with high-latency links; unused var removal; and man page typo (thanks
  to Michael Shields)

Version 1.2e

- check for attempt to use -f flag; exit as error
- if AUTOSSH_GATETIME is 0, then disable any of the startup
  failure bailouts, and just retry
- set SO_REUSEADDR on listening socket (Jedi One's suggestion)
- show port number in some error messages
- note in man page and README about -M 0 turning port monitoring off
- remove duplicate include of sys/socket.h

Version 1.2d

- AIX support (thanks to Stefan Rodenstein)
- fix argument rewrite bug when using AUTOSSH_PORT (thanks
  to Peter Williams)
- log pid of ssh child just after fork

Version 1.2c

- use Marcus Friedl's suggestion to simply connect to "127.0.0.1" 
  rather than "localhost", as not really using IPv6 anyway. And this
  gets rid of annoying ipv6 localhost message on Solaris at least.
- support for MacOS X using Greg Parker's fakepoll.

Version 1.2b

(Thanks to Simon Easter for bug reports and trials)

- fix file descriptor leak
- setsockopt()'s don't work for Solaris either. Give up on them.
- set close-on-exec for read socket so will be closed when
  ssh executed
- do shutdown() before close() (paranoia)
- close read socket before exit
- pull read socket open and close up out of ssh_run()
- cosmetic changes to some loops, get rid of newlines in some
  errlog strings.

Version 1.2a

- setsockopt() will not set timeouts on socket read/write ops
  under Linux 2.2 kernels (and earlier, I presume). So unless
  someone tells me we really need them, I've #ifdef'd  the
  setsockopt()s out for Linux.
- check value of fd returned by accept().
- Oh, there's a man page now. Unfortunately, it doesn't render 
  for Solaris. Sorry, Solaris users are still stuck with the
  README.

Version 1.2

- Major restructuring of code, mostly to support the change to 
  a loop of forwarded ports to test the network connection.
- Incremental back off on rate of connection attempts when
  there are rapid failures to establish/maintain a connection.

Version 1.1b

- change handling of ssh exit status
- introduce "starting gate" time: ssh process that dies too
  early is deemed not to have made it out of the starting
  gate, and autossh exits.

Version 1.1a

- fix race after failure to exec ssh where parent will
  loop attempting to restart
- add -V version flag
- use strtoul() for environment option parsing
- drop useless intermediate function ssh_setwatch()

Version 1.1

Initial release