Merge in current state of store refactoring work. The search method has been

Merge in current state of store refactoring work. The search method has been
fully implemented for all current store types.

Patches applied:

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--base-0
   tag of robertc@squid-cache.org--squid/squid--HEAD--3.0--patch-516

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-1
   merge in the diskio logic cleanup we depend on

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-2
   setup a unit test environment for store.cc

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-3
   merge from HEAD

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-4
   start formal store interface refactoring, moving stat into the Store hierarchy

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-5
   make SwapDirs reference counted, test StoreControllers new methods

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-6
   move storeDirInit to be just the virtual init method on Store

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-7
   nuke Config.Swap.maxSize for calls to Store::Root().maxSize()

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-8
   migrate Reference and dereference to StoreController

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-9
   make store maintenance a top level Store api call

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-10
   move storeDirUpdateSize to Store interface

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-11
   move store creation into the Store API

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-12
   move storeDirSync into the Store API

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-13
   more INDEXSD nuking, and push the swapdir aspects of store statting into SwapDir

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-14
   more INDEXSD nuking. move SwapDir.low_size to a minSize() query

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-15
   another INDEXSD removal, storeDirCallback folded into the Store API

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-16
   correct logic error in StoreController::Callback from previous changes

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-17
   storeUnlink -> StoreEntry::unlink

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-18
   snapshot, beginning the introduction of a separate HashIndex store layer

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-19
   clean up store entry construction a little

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-20
   setup Ufs testing harness

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-22
   make RemovalPolicySettingsa class

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-23
   make testUfs use a real UFSSwapDir

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-24
   testUfs should clean up after it succeeds

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-25
   merge from HEAD

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-26
   wave enough dead chickens that we can set a store object to public

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-27
   get testUfs to put an object in the store successfully

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-28
   get testUfs to save clean log state

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-29
   let rebuild work fully on testUfs, so we can start adapting RebuildState to being a StoreSearch

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-30
   implement basic search for UFSSwapDirs

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-31
   check UFS search iteration stops

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-32
   convert RebuildState to CDBATA_CLASS2

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-33
   switch from log based searching to replacement policy based searching for UFSSwapDirs

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-34
   rename variable s to swapData in UFS restore from directory routine

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-35
   store rebuilds need to check for duplicates across the entire store.

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-36
   start testing COSS - store creation for starters

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-37
   make StoreSearch a header of its own, and implement search(NULL,NULL) for COSS

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-38
   start testing the Null store type

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-39
   implement null store search(NULL, NULL)

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-40
   remove a couple of unneded SwapDir.h includes

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-41
   move search one level up in the Store hierarchy

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-42
   test the rudiments of StoreHashIndex

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-43
   move hash initialisation into StoreHashIndex::init

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-44
   oops, forgot new files

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-45
   implement search for StoreHashIndex

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-46
   void * apis suck badly. fix a casting problem with destroyStoreEntry

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-47
   implement search for StoreController

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-48
   convert store object statting to use the StoreSearch api

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-49
   convert cache digests to the store search api

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-50
   convert store cleanup callback to use the store api

 * robertc@squid-cache.org--squid/squid--store-interface--3.0--patch-51
   merge from HEAD