author: Martin Huter <mhuter@barracuda.com>, Alex Rousskov <rousskov@measurement...

author: Martin Huter <mhuter@barracuda.com>, Alex Rousskov <rousskov@measurement-factory.com>, Christos Tsantilas <chtsanti@users.sourceforge.net>
Bug 2619: Excessive RAM growth due to unlimited adapted body data consumption

If the client does not read from the open connection (i.e. the user does not
confirm the browsers download-message-box in microsofts IE), squid keeps on
reading data from the ICAP server into the store entry, while no more data
can be delivered to the client.
Thus the store entry in memory is growing and squid may - in worst case -
consume memory up to the size of the users download.

This patch add API to StoreEntry to call the producer back when released
memory/space from the StoreEntry and add code to the ICAP client code to not
consume body data comes from the ICAP server when there is not available space
in the store entry.