Revision history for Perl extension Pvm.

1.2.1 to 1.2.2
---------------
Fix segfault in tasks() if there is an error.
Get rid of string_type to avoid integer overflow problems.
unpack() and precv() interpret everything as a string, like pack().
Thanks to Sven Neuhaus <sn@neopoly.com> for the patch!

1.2 to 1.2.1
----------
Debug for proper compilation under Perl 5.6.0.
Thanks to Florian Frank <flori@neopoly.de>
for the patch.
Denis P. Leconte


1.0 to 1.2
----------
Reimplement in a new xs shell so it will compile
and test OK on Perl 5.0005 
Denis P. Leconte


1.0 to 1.1
----------
1, Parallel::Pvm::spawn now accepts argv argument

2, Parallel::Pvm::notify accepts "cnt" argument
   for PvmHostAdd

3, Parallel::Pvm::recv_notify correctly receives
   list of host tids for PvmHostAdd notification

4, Some internal buffering optimization.

(1--3 was contributed by Rob Torop)