Misleading 'not available' message

[ewxrjk]

# rsbackup --verbose --backup --store /backup8
[..] 
WARNING: cannot backup araminta:root to backup5 - device not available
WARNING: cannot backup araminta:root to backup6 - device not available
WARNING: cannot backup araminta:root to backup7 - device not available
INFO: backup araminta:root to backup8

In fact backup7 is available, it has just been suppressed by the --store option.

[ewxrjk]

This is tedious and slightly disruptive to fix since:

• the --store option completely destroys the list of stores from the configuration file.
• having got past that it would be necessary to inspect every configured store, creating a disk access where previously there was none.

Dropping the proposed milestone for now.

[ewxrjk]

Fixed in 861a0e5.