Description of problem:
Upgrading gluster-swift from 3.3.0 to 3.3.1 wipes out at least one config file, without properly saving the original copy.

Steps to Reproduce:
1. Start with working gluster-swift running 3.3.0 from kkeithley's repo.
2. Issue 'yum upgrade' to upgrade to 3.3.1.
  
Actual results:
The proxy-server.conf file is overwritten with the default.  A proxy-server.conf.rpmsave file is created, but it has the same contents as the .conf file.  Any local changes are simply gone.

Expected results:
It should have left my config alone and created .rpmnew files.

Additional info:

  Updating   : glusterfs-swift-object-3.3.1-1.fc17.noarch                 13/41
warning: /etc/swift/object-server/1.conf saved as /etc/swift/object-server/1.conf.rpmsave
  Updating   : glusterfs-swift-plugin-3.3.1-1.fc17.noarch                 14/41
  Updating   : glusterfs-swift-account-3.3.1-1.fc17.noarch                15/41
warning: /etc/swift/account-server/1.conf saved as /etc/swift/account-server/1.conf.rpmsave
  Updating   : glusterfs-swift-container-3.3.1-1.fc17.noarch              16/41
warning: /etc/swift/container-server/1.conf saved as /etc/swift/container-server/1.conf.rpmsave
  Updating   : glusterfs-swift-proxy-3.3.1-1.fc17.noarch                  17/41
warning: /etc/swift/proxy-server.conf saved as /etc/swift/proxy-server.conf.rpmsave

Comparing the entire /etc/swift directory with that on my other UFO server, only proxy-server.conf has changes, so I do not know why the 1.conf files were replaced/rpmsaved.