[Click] Make SetUDPChecksum more verbose when something is wrong

[Ian Rose]

Very minor point here, but you might want that keyword to default to 
false instead.  Not only does this avoid behavior changes in all legacy 
code, but its more consistent with similar, existing elements with a 
VERBOSE keyword (such as CheckARPHeader, CheckIPHeader and CheckTCPHeader).

- Ian


Eddie Kohler wrote:
> Hi Bart,
> 
> Totally reasonable.  A patch to this effect is checked in.
> E
> 
> 
> Bart Braem wrote:
>> Hi,
>>
>> SetUDPChecksum now uses checked_output_push to output packets it can  
>> not checksum. However, it would be nice if some warning would be  
>> output, this silent behaviour is quite hard to debug. I suggest giving  
>> a warning when packets are in this case, based on a verbose keyword  
>> that defaults to on.
>>
>> Regards,
>> Bart Braem
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