sqlite dburi is not an uri

[tiran]

The sqlite storage plugin takes a dburi parameter. However the parameter does not take URIs as defined in https://www.sqlite.org/c3ref/open.html. The code assumes that the dburi parameter is a path to a file. Neither :memory: nor file: URIs are supported.

Custodia should also use PRAGRMA to get the actual path of the sqlite file for chmod().

>>> c = sqlite3.connect(':memory:')
>>> c.execute('PRAGMA database_list;').fetchall()
[(0, 'main', '')]
>>> c = sqlite3.connect('/tmp/test.db')
>>> c.execute('PRAGMA database_list;').fetchall()
[(0, 'main', '/tmp/test.db')]
# Python 3 only
>>> c = sqlite3.connect('file:/tmp/test.db', uri=True)
>>> c.execute('PRAGMA database_list;').fetchall()
[(0, 'main', '/tmp/test.db')]
>>> c = sqlite3.connect('test.db', uri=True)
>>> c.execute('PRAGMA database_list;').fetchall()
[(0, 'main', '/home/heimes/redhat/pki/test.db')]