* device-src/s3.c: Add support for openstack swift api.
* device-src/s3.h: Add support for openstack swift api.
* man/xml-source/amanda-devices.7.xml: Add openstack-swift-api 
  property.


git-svn-id: https://amanda.svn.sourceforge.net/svnroot/amanda/amanda/branches/3_3@4504 a8d146d6-cc15-0410-8900-af154a0219e0