portupgrade - skipping -held by user- meaning?

[Vizion]

>
>fsbd06 at mlists.homeunix.com wrote in response to
>>Vizion <vizion at vizion.occoxmail.com> wrote:

>> I will write a short script to check for changes in pkgtools.conf and
>> run it both before and after portupgrade is run. That way I will at
>> least have a handle on what is going on.
> 

>It wont change by itself.

Sure -- but it must have been changed automatically on my system during a package installation process-  I certainly made no manual or other entries in it and noone else has root access.

david