* perl/Amanda/Status.pm (new): Return error if it can't open the
  amdump_log file.
* perl/Amanda/Rest/Status.pm, server-src/amstatus.pl: Handle error.


git-svn-id: https://svn.code.sf.net/p/amanda/code/amanda/trunk@5969 a8d146d6-cc15-0410-8900-af154a0219e0