[rackspace] Add support for httpsRedirect flag
[rackspace] Fetch https_redirect on demand if it is nil
Move chunk_size parameter to the connection_options table
[GH-3156] Fix fog binary dependencies

The Sakuracloud `bin` file was removed to `v0.0.4` but the dependency
was not declared.

Using `$ fog` without manually updating the dependency would trigger a
require error due to this missing file.

This adds the minimal dependency required.
Merge pull request #3160 from fog/3156_fix_fog_binary

[GH-3156] Fix fog binary dependencies
Merge pull request #3146 from md5/https_redirect

Add support for httpsRedirect flag on Rackspace LB
Merge pull request #3154 from phacops/fix-rackspace-storage-documentation

Move chunk_size parameter to the connection_options table