annex.adjustedbranchrefresh

Added annex.adjustedbranchrefresh git config to update adjusted branches
set up by git-annex adjust --unlock-present/--hide-missing.

Note, in a few cases, I was not able to make the adjusted branch
be updated in calls to moveAnnex, because information about what
file corresponds to a key is not available. They are:

* If two files point to one file, then eg, `git annex get foo` will
  update the branch to unlock foo, but will not unlock bar, because it
  does not know about it. Might be fixable by making `git annex get
  bar` do something besides skipping bar?
* git-annex-shell recvkey likewise (so sends over ssh from old versions
  of git-annex)
* git-annex setkey
* git-annex transferkey if the user does not use --file
* git-annex multicast sends keys with no associated file info

Doing a single full refresh at the end, after any incremental refresh,
will deal with those edge cases.

Command/ReKey.hs

@@ -90,7 +90,7 @@ linkKey file oldkey newkey = ifM (isJust <$> isAnnexLink file)
 	 - This avoids hard linking to content linked to an
 	 - unlocked file, which would leave the new key unlocked
 	 - and vulnerable to corruption. -}
-	( getViaTmpFromDisk RetrievalAllKeysSecure DefaultVerify newkey $ \tmp -> unVerified $ do
+	( getViaTmpFromDisk RetrievalAllKeysSecure DefaultVerify newkey (AssociatedFile Nothing) $ \tmp -> unVerified $ do
 		oldobj <- calcRepo (gitAnnexLocation oldkey)
 		isJust <$> linkOrCopy' (return True) newkey oldobj tmp Nothing
 	, do