Based on patch by Hugo Lopes Tavares.

samples to little-endian and vice versa.

and warns about potential uninitialized use.
Silence that by initializing it to null.

CID 1131948:  Logically dead code  (DEADCODE)

CID 1131946:  Unchecked return value  (CHECKED_RETURN)

CID 1131949:  Dereference null return value  (NULL_RETURNS)

Most of the work is by Alexandre.

#13633: Added a new convert_charrefs keyword arg to HTMLParser that, when True, automatically converts all character references.

a new SSLContext object with secure default settings.

Issue #19715: try the utime(..., None) approach again, now that it should be more precise under Windows

a year before 1900.