This reverts commit 8cbf8254.

  * Move #set_cookie and #delete_cookie inline to optimize. These optimizations should
    almost certainly be sent back upstream to Rack. The optimization involves using
    an ivar for cookies instead of indexing into the headers each time.
  * Was able to use a bare Hash for headers now that cookies have their own joining
    semantics (some code assumed that the raw cookies were an Array).
  * Cache blankness of body on body=
  * Improve expand_cache_key for Arrays of a single element (common in our case)
  * Use a simple layout condition check unless conditions are used
  * Cache visible actions
  * Lazily load the UrlRewriter
  * Make etag an ivar that is set on prepare!

Fixes bug where Memcached connections get corrupted when an invalid expire is passed in [#2854 state:resolved]

This reverts commit be1dbf32.

Signed-off-by: NDavid Heinemeier Hansson <david@loudthinking.com>

Decouple the local cache strategy from MemCacheStore for reuse with other remote stores [#1653 state:resolved]
Signed-off-by: NJoshua Peek <josh@joshpeek.com>

This reverts commit 19895f08.

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Implement increment/decrement on cache storage engines, using read/write by default and using atomic command on memcache

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8764 5ecf4fe2-1ee6-0310-87b1-e25e094e27de