[PR PATCH] buku: fix deprecation warning for python3>=3.11

[Vinfall <Vinfall@users.noreply.github.com>]

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There is a new pull request by Vinfall against master on the void-packages repository

https://github.com/Vinfall/void-packages master
https://github.com/void-linux/void-packages/pull/40551

buku: fix deprecation warning for python3>=3.11
#### Changes

Followup of #40526 and jarun/buku/pull/605.

Add the necessary patch to remove the DeprecationWarning `'cgi' is deprecated and slated for removal in Python 3.13` in buku caused by Python3 version update (3.11 as of writing).

#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, (x86_64-glibc)
- I built this PR locally for these architectures:
  - armv6l 
- `xlint` also reports no error.

A patch file from https://github.com/void-linux/void-packages/pull/40551.patch is attached

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From 34453fffdb10d83dd135e9b661530298f70de97a Mon Sep 17 00:00:00 2001
From: Vinfall <91039000+Vinfall@users.noreply.github.com>
Date: Wed, 16 Nov 2022 03:26:49 +0000
Subject: [PATCH] buku: fix deprecation warning for python3>=3.11

---
 srcpkgs/buku/patches/remove-cgi-warning.patch | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 srcpkgs/buku/patches/remove-cgi-warning.patch

diff --git a/srcpkgs/buku/patches/remove-cgi-warning.patch b/srcpkgs/buku/patches/remove-cgi-warning.patch
new file mode 100644
index 000000000000..2075e2486431
--- /dev/null
+++ b/srcpkgs/buku/patches/remove-cgi-warning.patch
@@ -0,0 +1,37 @@
+--- a/buku
++++ b/buku
+@@ -19,10 +19,10 @@
+ 
+ import argparse
+ import calendar
+-import cgi
+ import codecs
+ import collections
+ import contextlib
++import email.message
+ import json
+ import locale
+ import logging
+@@ -3811,15 +3811,17 @@
+         if soup.meta and soup.meta.get('charset') is not None:
+             charset = soup.meta.get('charset')
+         elif 'content-type' in resp.headers:
+-            _, params = cgi.parse_header(resp.headers['content-type'])
+-            if params.get('charset') is not None:
+-                charset = params.get('charset')
++            m = email.message.Message()
++            m['content-type'] = resp.headers['content-type']
++            if m.get_param('charset') is not None:
++                charset = m.get_param('charset')
+ 
+         if not charset and soup:
+             meta_tag = soup.find('meta', attrs={'http-equiv': 'Content-Type'})
+             if meta_tag:
+-                _, params = cgi.parse_header(meta_tag.attrs['content'])
+-                charset = params.get('charset', charset)
++                m = email.message.Message()
++                m['content'] = meta_tag.attrs['content']
++                charset = m.get_param('charset', charset)
+ 
+         if charset:
+             LOGDBG('charset: %s', charset)