=head1 VERSION HISTORY
=over 1
=item V0.52
=over 1
=item Fixed a long-standing bug on pure 32-bit perls (i.e. on 32-bit systems
that don't use Perl's software support for 64-bit integers) that would cause
"Modification of non-creatable array value attempted" errors.
Counterintutitively, the ternary operator even seems slightly faster than the
bit-shifting it replaces now.
=back
=item V0.51
=over 1
=item Fixed C<to_hash()> that the change to iterative tree walking had broken. Yes, there are tests for it, too now.
=item Dropped the redundant address parsing/printing code in favor of L<Socket|Socket> functions.
=back
=item V0.5
B<Attention: Breaking Changes!>
=over 1
=item This version removes the global C<$errstr> variable and switches to the
same interface as L<Net::CIDR::Lookup::IPv6> that signals errors using
exceptions. So all menthods but C<new> may now die if you don't wrap them in
C<eval>or equivalent.
=item C<dump> is called more sensibly C<to_hash> now.
=back
Regular changes that shouldn't break anything:
=over 1
=item Replaced the recursive implementations of C<lookup()> and C<walk()> with
iterative ones for about a 30% speed increase.
=item Moved version history to its own POD file
=back
=item v0.41 Version bump to sync with IPv6 version
=item v0.4 Version bump for inclusion of the IPv6 version
=item v0.3.1
=over 1
=item Replaced the simplistic list-based CIDR block splitting function with bit-fiddling for about a threefold speedup of C<add_num_range> and slightly less in C<add_range>.
=item Recursive merging-up up of blocks during C<add_*> works now. If e.g.
you had a /24 and an adjacent /25 net with the same value before, adding a new
/25 would have merged the new block with the existing /25, resulting in two
adjacent /24s with the same value because only single-level merging was
possible. Now the two will be merged to a single /23.
=item Removed some redundant tests and added new ones.
=item Removed some leftover debug code.
=item Some small fixes/improvements like stricter range checking in C<add_range>
=back
=item v0.3 First CPAN release
=back