Issue #22247: Add NNTPError to nntplib.__all__.

diff --cc Misc/NEWS
index 83e0dbd8afa74a72aa30edab5c89b522fe02a288,1ba6a4ac6525514ebe36c742bb26eeb7d3edbb58..1a02975986d1bf139da03705f492feb391dfc829
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -137,10 -32,8 +137,12 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #22247: Add NNTPError to nntplib.__all__.
+ 
 +- Issue #22366: urllib.request.urlopen will accept a context object
 +  (SSLContext) as an argument which will then used be for HTTPS connection.
 +  Patch by Alex Gaynor.
 +
  - Issue #4180: The warnings registries are now reset when the filters
    are modified.