ssl.get_server_certificate should allow specifying certificate / key type

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-10-29.09:59:05.969>
labels = ['expert-SSL', 'type-feature', '3.8']
title = 'ssl.get_server_certificate should allow specifying certificate / key type'
updated_at = <Date 2022-03-15.13:21:55.154>
user = 'https://github.com/hannob'

bugs.python.org fields:

activity = <Date 2022-03-15.13:21:55.154>
actor = 'hanno'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['SSL']
creation = <Date 2017-10-29.09:59:05.969>
creator = 'hanno'
dependencies = []
files = []
hgrepos = []
issue_num = 31892
keywords = []
message_count = 5.0
messages = ['305182', '305380', '305414', '305420', '415242']
nosy_count = 5.0
nosy_names = ['janssen', 'christian.heimes', 'alex', 'dstufft', 'hanno']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue31892'
versions = ['Python 3.8']