prevent readline() calls from consuming too much member.  Patch by Jyrki
  Pulliainen.

  than 100 headers are read.  Adapted from patch by Jyrki Pulliainen.

Patch by Xavier de Gaye.

Au_read.readframes() now updates current file position and reads correct
number of frames from multichannel stream.  Au_write.writeframesraw() now
correctly updates current file position.  Au_read and Au_write now correctly
work with file object if start file position is not a zero.

  limiting the call to readline().  Original patch by Michał
  Jastrzębski and Giampaolo Rodola.

with test fixes by Serhiy Storchaka.

  limit line length.  Patch by Emil Lind.

Since all versions since 2.2 are under the same licensing terms,
this saves the release manager from touching the two files for
every new minor release.

and older binaries.

This avoids race conditions when other programs are monitoring
the maildir directory.  Patch by janzert.

(fixes a regression in 3d46ef0c62c5, issue #18873)

source code encoding only in comment lines.

Initial patch by Bruno Piguet.

This is implemented as if a useful .netrc file could exist without passwords,
which is possible in the general case; but in fact our netrc implementation
does not support it.  Fixing that issue will be an enhancement.

Patch by Vlad Shcherbina

The SSLFakeFile.readline() method needs to support limiting readline() as
well.  It's not a full emulation of readline()'s signature, but this class
is only used by smtplib's code, so it doesn't have to be.

Modified version of original patch by Christian Heimes.

Patch contributed by Vajrasky Kok. Addresses Issue #17324