[MERGE] [bug 307394] Loosen check in add_records()

[John Arbash Meinel]

John Arbash Meinel has voted comment.
Status is now: Approved
Comment:
I would ask that we really evaluate this change and make sure it won't 
allow corrupt data to be inserted.

I can agree that allowing compression parent to be different is ok, but 
I have the feeling we really should check the sha1 values are identical 
if the records are not identical.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C20090119203123.GA24366%40ganieda.vernstok.nl%3E
Project: Bazaar