Make formpost work with multiple tempurl keys.

Formpost wouldn't look at X-Account-Meta-Temp-URL-Key-2 for signature
validation, which was confusing to users. Now it does, and there's a
utility function that formpost and tempurl both use to help prevent
divergence in the future.

Also removed formpost's custom cache-lookup logic. Formpost was
looking for tempurl keys in memcache, but it's been broken since
commit 21343ab (2013-05-02) when tempurl changed its memcache keys, so
the lookup would always miss. (Since tempurl started storing *lists*
of keys, formpost would have choked on the new data, so that oversight
was the only thing keeping formpost working at all.)

Now formpost just uses the same get_account_info() call as everyone
else does, so it gets all the benefits of the new caching framework.

Change-Id: I426d8f2882ebe3ce373de604b9ff18846f5999e3
Merge "Make formpost work with multiple tempurl keys."
Add test for swift.common.utils.lock_file

Change-Id: Id03f130ad7016b11b740050b7aadf879773d5a5f
docfix apache2 now supports client chunked encodin

As reported in the documentation bug, the apache deployment guide's
reference to apache2 mod_wsgi not supporting client chunked encoding
has become outdated. It now supports this feature, using an optional
parameter.

Updated the paragraph in question to reflect this

patchset 2 mentions the WSGIChunkedRequest variable and adds it
to the sample configs - On by default. Feedback welcome

fixes bug 1194935

Change-Id: I07c5c8506ac34e1e0e08fa6d961babde2f9b7367
Merge "Add test for swift.common.utils.lock_file"
Update docs to use default XFS inode size

In past couple of years, the XFS team has greatly improved inode use in
xfs.  With more recent kernels, there is no performance penalty for
using the default inode size, and a smaller inode size gives us
improvements in other areas where disk access is involved.

DocImpact

Change-Id: Ie9da53a6e8bf43d1d02881befbb52595462c9f2e
Merge "Update docs to use default XFS inode size"
Merge "docfix apache2 now supports client chunked encodin"