Fixed Solaris build problem.

2.3:
----

Identical to 2.3b3, sigchld handlig is assumed to be correct now and
works with various versions of the Linux kernel.

Version 2.3 has sound support, see e.g. `cstream -Oa -o /dev/dsp`.

2.3b3:
------

Further SIGCHLD fixes.

2.3b2:
------

Fix SIGCHLD handling so that stopping and continuing the child in a
concurrent mode would not terminate.

2.3b1:
------

Version 2.3 has sound support, see e.g. `cstream -Oa -o /dev/dsp`

version 2.2:
------------

TCP/IP socket support.

Linux glibc 64 bit files.

Version 2.1:
------------

- Add audio mode: -O a/-I a try to switch output file into CD-quality
  16bit 44100Hz stereo mode.  If input is just generated, a sine wave
  of 440 Hz will be played.
- Add tee-fd mode.  -O t will copy the stream to file descriptor 3
  (which must already be opened by parent process).

Version 2.0:
------------
- Add -c flag for concurrent mode.
- Add -B flag (buffering of multiple input blocks before output
  blocks are written).
- Add -l flag (statistics will include line count).
- If input data is just 'generated', use a buffer that remotely
  resembles ASCII text with a line length of 76 chars and has a
  newline at the end of data.
- Number of bytes transferred is also displayed in GB/MB/KB, if
  appriopriate. 
- Change throughput report to be shorter.
- Add automatic tests `make check`.
- Througput reporting on signals got the wrong time when cstream was
  not called with -v > 0.
- Use SIGINFO for throughput report.
- Use more values from configure script.
- Throughput report is now asynchronous, not after next read() or write().
- Throughput report will report buffer fillage if -B is in use.

Version 1.4:
------------

- Fix Linux compilation problems.
- The -b and -t options now also recognize 'k', 'm', 'g' for kilo-,
  mega-, gigabyte like the -n option did.
- The signal for shutdown is now SIGUSR2, not SIGHUP.

Version 1.3:
------------

- Fix permissions of created files
- You can now specify the input file without using a switch (if it is
  the last argument)
- Improve messages

Version 1.2:
------------

- Argument checking for -v was broken, fixed.

Version 1.1:
------------ 

- Fix version number reporting, introduce -V switch.
- Fix usage() typos.

Version 1.0:
------------

- Initial version.
