Allow uploading files with SimpleHTTPRequestHandler

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-10-11.00:53:17.264>
labels = ['type-feature', 'library', '3.10']
title = 'Allow uploading files with SimpleHTTPRequestHandler'
updated_at = <Date 2020-10-18.14:36:33.925>
user = 'https://github.com/lufte'

bugs.python.org fields:

activity = <Date 2020-10-18.14:36:33.925>
actor = 'jacobsorme'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2020-10-11.00:53:17.264>
creator = 'lufte'
dependencies = []
files = ['49506']
hgrepos = []
issue_num = 42004
keywords = []
message_count = 5.0
messages = ['378418', '378424', '378498', '378550', '378866']
nosy_count = 3.0
nosy_names = ['jugmac00', 'lufte', 'jacobsorme']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue42004'
versions = ['Python 3.10']