Bug #1599782: Fix segfault on bsddb.db.DB().type().

The problem is that _DB_get_type() can't be called without the GIL
because it calls a bunch of PyErr_* APIs when an error occurs.
There were no other cases in this file that it was called without the GIL.
Removing the BEGIN/END THREAD around _DB_get_type() made everything work.

close it.

if an exception occurs.

the parent window is withdrawn. This mirrors what dialog.tcl
does.

[Backport of rev52776 from the trunk.]

a2b_qp() function, instead leave it in the string as quopri.decode()
does.
 (backport from rev. 52765)

 (backport from rev. 52762)

 (backport from rev. 52754)

file name mangling.

 (backport from rev. 52733)

 (backport from rev. 52731)

installing .egg-info for a project that contains no modules or packages,
while using --root (as in bdist_rpm).  (Backport from trunk)

Two changes:

Where possible, use link()/remove() to move files into a directory; this
makes it easier to avoid overwriting an existing file.

Use _create_carefully() to create files in tmp/, which uses O_EXCL.

Replace C++ comment with C comment (fixes SF bug #1593525).

Both the Maildir and MH classes had this bug; the patch fixes both classes
and adds a test.

"sorted".
 (backport from rev. 52668)

 (backport from rev. 52666)

Fixes #1591996. Patch contributed by Neal Norwitz.

Bug #1588287: fix invalid assertion for `1,2` in debug builds.

bdist_rpm

Fixes #1557890.

Backported from trunk.

section with a link to the tutorial sections.

Backported from trunk.

the tuple isn't used as the "exception arguments tuple".
 (backport from rev. 52535)

 (backport from rev. 52532)

 (backport from rev. 52529)

 (backport from rev. 52527)

GNU modes.
 (backport from rev. 52524)