[Part of bug #1599254] Add suggestion to Mailbox docs to use Maildir, and warn user to lock/unlock mailboxes when modifying them

variables with nothing.  Also added tests.
This fixes bug #494589.

directive that is not documented that strptime will as well.

return negative numbers, per the underlying C implementation.

the relevant class instead of documentation on <type 'instance'>).

merged into the 2.5 maintenance branch:

- self->statement was not checked while fetching data, which could
  lead to crashes if you used the pysqlite API in unusual ways.
  Closing the cursor and continuing to fetch data was enough.

- Converters are stored in a converters dictionary. The converter name
  is uppercased first. The old upper-casing algorithm was wrong and
  was replaced by a simple call to the Python string's upper() method
  instead.

-Applied patch by Glyph Lefkowitz that fixes the problem with
 subsequent SQLITE_SCHEMA errors.

- Improvement to the row type: rows can now be iterated over and have a keys()
  method. This improves compatibility with both tuple and dict a lot.

- A bugfix for the subsecond resolution in timestamps.

- Corrected the way the flags PARSE_DECLTYPES and PARSE_COLNAMES are
  checked for. Now they work as documented.

- gcc on Linux sucks. It exports all symbols by default in shared
  libraries, so if symbols are not unique it can lead to problems with
  symbol lookup.  pysqlite used to crash under Apache when mod_cache
  was enabled because both modules had the symbol cache_init. I fixed
  this by applying the prefix pysqlite_ almost everywhere. Sigh.

This change allows running PyBench under Jython.

Pretty-print the Python version used for running PyBench.

Let the user know when calibration has finished.

[ 1563844 ] pybench support for IronPython:

Simplify Unicode version detection.

Make garbage collection and check interval settings optional if
the Python implementation doesn't support thess (e.g. IronPython).

Change the cache for _sys_version() to take the parameter into account.

Add support for parsing the IronPython 1.0.1 sys.version value - even
though it still returns '1.0.0'; the version string no longer includes
the patch level.

Add new API linux_distribution() which supports reading the full distribution
name and also knows how to parse LSB-style release files.

Redirect the old dist() API to the new API (using the short distribution name
taken from the release file filename).

Add branch and revision to _sys_version().

Add work-around for Cygwin to libc_ver().

Add support for IronPython (thanks for Anthony Baxter) and make
Jython support more robust.

Kammerhofer.

Kammerhofer.

release25-maint backport candidate, but the release manager has to
decide.

imported on non-windows systems.

cause the right files to be rebuilt.

far down.

of HANDLE, WPARAM, LPARAM data types.  Make parameterless foreign
function calls work.

was getting complaints from pychecker.)