docs: Updates for Caddy v2.4.4 (#189)

* docs: Updates for Caddy v2.4.4

* Adjust wording

* Clarify HTTPS proxy usage, reorder lb policies for clarity

* Reorder directives, add comments

src/docs/markdown/command-line.md

@@ -67,7 +67,13 @@ The ellipses `...` indicates a continuation, i.e. one or more parameters.
 
 - **[caddy upgrade](#caddy-upgrade)**
   Upgrades Caddy to the latest release
-  
+
+- **[caddy add-package](#caddy-add-package)**
+  Upgrades Caddy to the latest release, with additional plugins added
+
+- **[caddy remove-package](#caddy-remove-package)**
+  Upgrades Caddy to the latest release, with some plugins removed
+
 - **[caddy validate](#caddy-validate)**
   Tests whether a config file is valid
 
@@ -367,6 +373,27 @@ The upgrade process is fault tolerant; the current binary is backed up first and
 This command may require elevated privileges if your user does not have permission to write to the executable file.
 
 
+
+### `caddy add-package`
+
+<pre><code class="cmd bash">caddy add-package &lt;packages...&gt;</code></pre>
+
+Similarly to `caddy upgrade`, replaces the current Caddy binary with the latest version with the same modules installed, _plus_ the packages listed as arguments included in the new binary. Find the list of packages you can install from [our download page](https://caddyserver.com/download). Each argument should be the full package name.
+
+For example:
+
+<pre><code class="cmd bash">caddy add-package github.com/caddy-dns/cloudflare</code></pre>
+
+
+
+### `caddy remove-package`
+
+<pre><code class="cmd bash">caddy remove-package &lt;packages...&gt;</code></pre>
+
+Similarly to `caddy upgrade`, replaces the current Caddy binary with the latest version with the same modules installed, but _without_ the packages listed as arguments, if they existed in the current binary. Run `caddy list-modules --packages` to see the list of package names of non-standard modules included in the current binary.
+
+
+
 ### `caddy validate`
 
 <pre><code class="cmd bash">caddy validate