* bpo-29725: DOC: add text for arraysize in sqlite3.Cursor

Patch by Aviv Palivoda.

This commit contains the following commits from ghaering/pysqlite:

* https://github.com/ghaering/pysqlite/commit/f254c534948c41c0ceb8cbabf0d4a2f547754739
* https://github.com/ghaering/pysqlite/commit/796b3afe38cfdac5d7d5ec260826b0a596554631
* https://github.com/ghaering/pysqlite/commit/cae87ee68613697a5f4947b4a0941f59a28da1b6
* https://github.com/ghaering/pysqlite/commit/3567b31bb5e5b226ba006213a9c69dde3f155faf

With the following additions:

* Fixed a refcount error
* Fixed a compiler warning
* Made the string comparison a little more robust
* Added a whatsnew entry

creates not a cursor.  Patch by Xiang Zhang.

Patch by Jaysinh Shukla and Stéphane Wirtel.

Initial patch by Alex LordThorsen.

sqlite3.OptimizedUnicode is an alias for str in Python 3 and
its behavior is already tested in CheckOptimizedUnicode in
Lib/sqlite3/test/factory.py.

sqlite3.OptimizedUnicode was undocumented in 0fc10a33eb4c and
probably added back with the result of a bad merge.

* Connection.execute* methods don't create intermediate cursor objects
* Fix description of seq_of_parameters parameter
* Clarify that Warning is sqlite3.Warning
* sql_script parameter of Cursor.executescript() doesn't accept bytes
* Add missing tests
* Fix various markup errors

Initial patch by Dave Sawyer.

Reformat header above separator line (added if missing) to a common format.
Patch by Yoni Lavi.

Patch contributed by Dave Sawyer.

If you pass -1, the callable can take any number of arguments.

Added tests to verify the behavior.

Initial patch by Cédric Krier.

The behaviour of the close method is tested by ClosedCurTests
in Lib/sqlite3/test/dbapi.py.

This is basically a backport of https://github.com/ghaering/pysqlite/issues/73.

#26250: document the sqlite3.Cursor.connection attribute.  Initial patches by Aviv Palivoda and Varpu Rantala.

This changes the main documentation, doc strings, source code comments, and a
couple error messages in the test suite. In some cases the word was removed
or edited some other way to fix the grammar.

Tests by Jessica McKellar.

Issue #13773: sqlite3.connect() gets a new `uri` parameter to pass the filename as a URI, allowing to pass custom options.

Suggestion and patch by Mike Hoy.