* device-src/s3-device.c, device-src/s3.c: hanlde chunked
  transfer-encoding,
* device-src/s3.h (s3_upload): Add chunked argument.
* man/xml-source/amanda-devices.7.xml: Document new CHUNKER s3
  device-property.


git-svn-id: https://amanda.svn.sourceforge.net/svnroot/amanda/amanda/trunk@5088 a8d146d6-cc15-0410-8900-af154a0219e0