bpo-22589 Changed MIME type of .bmp to "image/bmp" (#4756)

Per rfc7903 this is the standard MIME type for this file format, and appears as such in the IANA MIME registry.

Lib/mimetypes.py

@@ -410,7 +410,7 @@ def _default_mime_types():
         '.bat'    : 'text/plain',
         '.bcpio'  : 'application/x-bcpio',
         '.bin'    : 'application/octet-stream',
-        '.bmp'    : 'image/x-ms-bmp',
+        '.bmp'    : 'image/bmp',
         '.c'      : 'text/plain',
         '.cdf'    : 'application/x-netcdf',
         '.cpio'   : 'application/x-cpio',

Misc/NEWS.d/next/Library/2017-12-08-15-09-41.bpo-22589.8ouqI6.rst

+Changed MIME type of .bmp from 'image/x-ms-bmp' to 'image/bmp'