Don't pass cache variable cids from array_keys, create a variable.
#1615078: Do not store default values for prefetch::default_values, just store the name and return the passed in $default - thanks to Fabianx for the idea
#1545536: move cache clears to shutdown, to reduce chances of race between get and set/del.
update variables.inc for changes in D7 head.
#1545094: add missing patch file, thanks mstrelan for reporting it missing.
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