* perl/Amanda/Changer/robot.pm: Add a BROKEN-DRIVE-LOADED-SLOT
  property.
* man/xml-source/amanda-changers.7.xml: Document it.


git-svn-id: https://svn.code.sf.net/p/amanda/code/amanda/trunk@5984 a8d146d6-cc15-0410-8900-af154a0219e0