Password lookup from older files

["Bjoern Biesenbach" <bjoern bjoern-b de>]

Hi,

i wrote a little patch that lets you open an encrypted file if another
file with the same password was opened (and the key saved in keyring)
before.
This works by iterating through all "Document File" entries in the
keyring. If the right password was found, it gets saved together with the
file uri the fasten up the next try to open that file.


  Bjoern Biesenbach        bjoern bjoern-b de
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