Document that zipfile decryption is insanely slow and fix a typo and
blatant lie in a docstring (it is not useful for security regardless of
how you spell it).
diff --git a/Doc/library/zipfile.rst b/Doc/library/zipfile.rst
index f1cfc1b..e3c852b 100644
--- a/Doc/library/zipfile.rst
+++ b/Doc/library/zipfile.rst
@@ -21,7 +21,8 @@
documentation). It can handle ZIP files that use the ZIP64 extensions
(that is ZIP files that are more than 4 GByte in size). It supports
decryption of encrypted files in ZIP archives, but it currently cannot
-create an encrypted file.
+create an encrypted file. Decryption is extremely slow as it is
+implemented in native python rather than C.
For other archive formats, see the :mod:`bz2`, :mod:`gzip`, and
:mod:`tarfile` modules.