man: move os-release, machine-info, vconsole.conf vars to envvar section
Strictly speaking, those are not environment variables, but they are compatible
and people think about them like this. Moving them makes them easier to find.
diff --git a/tools/make-directive-index.py b/tools/make-directive-index.py
index 8703c8a..9e4fe66 100755
--- a/tools/make-directive-index.py
+++ b/tools/make-directive-index.py
@@ -46,8 +46,8 @@
<refsect1>
<title>Environment variables</title>
- <para>Environment variables understood by the systemd
- manager and other programs.</para>
+ <para>Environment variables understood by the systemd manager
+ and other programs and environment variable-compatible settings.</para>
<variablelist id='environment-variables' />
</refsect1>