IPv6 bug resolved. Shared IPs feature added

[Robert I. <cor...@gm...>]

In svn:

* Resolved IPv6 bug, when using a dedicated IPv6-address per client.
   It was broken with the first address used by all virtual clients.

Is somebody using IPv6?

* Tag IP_SHARED_NUM added to enable multiple clients to use not a
   single common IP and not a unique IP-address, but several IP-address.
   If IP_SHARED_NUM=3, first client gets the first address, second the
second,
   third gets the third, whereas the forth client gets back the first
address and so on.
   The feature should enable to support more than 64K loading clients
without
   a need to assign a unique address to each client (which has its memory
price and
   its own limitations).

   Thus, to enable 200K loading clients, one can use about 64K clients per
address
   and IP_SHARED_NUM=4 will be enough for such cases.
   The feature can be useful also, when somebody is not willing to use a
unique
   IP per client, but does not like, that all clients are coming from the
same IP-address.
   An example of the IP_SHARED_NUM usage is in ./conf-examples/bulk.conf

   IP_SHARED_NUM=1 is the cases of the so-called "common-IP" for all
clients.
   Still defining the same IP-address in IP_ADDR_MIN and IP_ADDR_MAX will
   work as before for backward compartibility, and no need to specify
IP_SHARED_NUM=1.

Enjoy,

-- 
Sincerely,
Robert Iakobashvili,
coroberti %x40 gmail %x2e com
...........................................................
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