[server] Drop close/open steps in NativeSQLSource.restore()
The only place where this is called is in
ServerMigrationHelper.restore_database() where config.init_cnxset_pool is set
to False. So these steps appear to be useless.
Tutorials
~~~~~~~~~
We present a few tutorials of different levels. The blog building
tutorial introduces one smoothly to the basic concepts.
Then there is a photo gallery construction tutorial which highlights
more advanced concepts such as unit tests, security settings,
migration scripts.
.. toctree::
:maxdepth: 1
base/index
advanced/index
tools/windmill.rst
textreports/index
dataimport/index