fix to problem #4025 for --dump
Merge pull request #4026 from qunox/dumpchange

fix to problem #4025 for --dump
 fix getouput -o bug, should test it further
supress Please file a new issue... msg for already exist file
submit only show message if job status change
Remove unnecessary debug statement.
Correctly handle missing wall times.
Add publication information to the status response.
Fix status information for non-download commands.
Change error information to refer to the crab feedback list.
Merge pull request #4035 from qunox/supresserrormsg

supress Please file a new issue... msg for already exist file
Merge pull request #4036 from qunox/modifiedsubmitpy

submit only show message if job status change
Remove obsolete PandaCache code from UserTarball
Merge pull request #4034 from qunox/urlfix

 fix getouput -o bug, should test it further
Delegate the proxy if the user certificate is expiring and the trusted retriever list has changed. Fixex #4039
Merge pull request #4040 from mmascher/master

Delegate the proxy if the user certificate is expiring and the trusted r...
improve instance handling
Consider the 'UNKNOWN' task state as successful in crab submit
enable xrootd url output
Merge pull request #4046 from qunox/xrootenable

enable xrootd url output