Deleting ipSecPolicyTimePeriod related classes from IPsec PIB

Hi Bert,

In March, we received your comments on IPsec PIB and made modifications accordingly. The only remaining
issue is about the ipSecPolicyTimePeriod classes. You and I discussed two solutions and both seemed to
have some drawback:

Solution #1. Put the ipSecPolicyTImePeriod classes into a separate module within the IPsec PIB document.
The drawback is that since the title of the draft is IPsec PIB, it should not contain a separate module that
is not IPsec related. People will probably not look into this draft to find time related PIB classes

Solution #2. Put the ipSecPolicyTime Period classes into a separate module in a separate IETF draft. The
drawback is that it seems to me that IETF does not want to entertain another PIB draft. 

At the end of our April e-mail discussions, you were going to check if the TimePeriod classes are the only
ones that should be separate from the IPsec PIB. I am now proposing another simpler solution as follows. 

If, after checking the document, you also think that the TimePeriod classes are the only ones that are not
IPsec specific, what about we delete the ipSecPolicyTimePeriod classes from the IPsec PIB so that we can
move on?

If on the other hand, you think that there are other stuff that are not IPsec specific, please let use know. Thanks.

Best regards
Man Li