Log Message:
Update to 1.9011 (addresses PR 28429):

= 2004/05/31 1.9011

Some speed improvements from Todd R. Eigenschink

= 2004/04/12 1.9009

Fix to netmasks.t for compatability with older perls

= 2004/04/06 1.9008

Added cidrs2inverse() which will find the gaps in a list of blocks.

Based on a request from Howard Jones the tag() method was added.
It allows you to store your own data in a Net::Netmask object.
(Of course, you could have anyway as long as you didn't use the
keys 'IBASE' or 'BITS')

Long ago, Alexandros M Manoussakis reported a bug that findAllNetblock
would often return the same block multiple times.  Fixed.

Based on requests from Alexandros M Manoussakis and Lamprecht
Andreas the undefined behavior for overlapping blocks with
cidrs2contiglists is no longer.  Such blocks will be in the same
sublist.

Based on a requests from Tom Rudnick and Anthony Pardini new function
was added:  cidrs2cidrs().  cidrs2cidrs will condense a set of
netblocks by combining blocks together that make up larger blocks.

Anthony Pardini, Frank Tegtmeyer and George Walker pointed me to
a bug with the contains() method.  Fixed.