printing src and dst addresses as integers

[Carter Bullard]

Gentle people,
In support of some database guys call to action, I've added format specification
for printable fields.  This will allow you to print things like IP addresses as
dot-notational strings (the default), or numbers in various formats like hex,
signed and unsigned integers.

It seems that doing arithmetic with IP addresses is a bit weird in some databases
if they are inserted as strings, so these formats should be useful.  There is still
a lot of work, as I have only implemented this for IP addresses right now.

Signed and unsigned support for printing IPv6 addresses as integers was a trick,
but its there.  As well as hex and dot-notation strings.  

Interesting, its not until you print these huge numbers do you realize simple
things like ' it takes more chars to print a signed number than it does the
same number as unsigned '.   I'm sure this is obvious to most, but its interesting
to me.  

So here is a link local IPv6 address, (the most common found in LANs) as IPv6, hex, signed and unsigned:

  fe80::a667:6ff:fe4d:16b5
  0xfe80000000000000a66706fffe4d16b5
 -168147341466791857934322153354913715893
  338288524927261089666009457070797821621

You generate these using the new print field format support:

   -s saddr:42
   -s saddr:42:0x%x
   -s saddr:42:%d
   -s saddr:42:%u

This is still early, so any opinions, suggestions, reactions etc is most welcome.
This support is in the new argus-clients-3.0.5.32, which I'm uploading now.

Thanks for all the support !!!!
   
Carter

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