2.81rc5 CHANGELOG and man/dnsmasq.8 manual page improvements

Hi Simon,

>         Add --shared-network config. This enables allocation of addresses
>         the DHCP server in subnets where the server (or relay) doesn't
>         have an interface on the network in that subnet. Many thanks to
>         kamp.de for sponsoring this feature.
Does this paragraph lack a preposition "by" early on the 2nd line, or am
I mis-guessing the purpose?

...enables allocation of addresses *by* the DHCP server...

The manual page also seems to offer room for linguistic improvement
(apparently written by a German, so I see the typical patterns, and also
the misuse of which vs. that.

I am attaching a patch series vs. git to fix several issues in the
manpage and CHANGELOG.

From 35b88d98429e2fe016d9989d220f6faf2b933764 Mon Sep 17 00:00:00 2001
From: Matthias Andree <matthias.andree@gmx.de>
Date: Sun, 5 Apr 2020 11:18:05 +0200
Subject: [PATCH 1/5] man/dnsmasq.8: Properly capitalize DHCP acronym.
2 files changed