doc: move fetchers and trivial builders under builders

doc/builders/fetchers.xml

@@ -1,8 +1,8 @@
-<section xmlns="http://docbook.org/ns/docbook"
+<chapter xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="sec-pkgs-fetchers">
- <title>Fetcher functions</title>
+         xml:id="chap-pkgs-fetchers">
+ <title>Fetchers</title>
 
  <para>
   When using Nix, you will frequently need to download source code and other files from the internet. Nixpkgs comes with a few helper functions that allow you to fetch fixed-output derivations in a structured way.
@@ -145,4 +145,4 @@ stdenv.mkDerivation {
    </listitem>
   </varlistentry>
  </variablelist>
-</section>
+</chapter>

doc/builders/trivial-builders.xml

@@ -1,7 +1,7 @@
-<section xmlns="http://docbook.org/ns/docbook"
+<chapter xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="sec-trivial-builders">
+         xml:id="chap-trivial-builders">
  <title>Trivial builders</title>
 
  <para>
@@ -76,4 +76,4 @@
    </listitem>
   </varlistentry>
  </variablelist>
-</section>
+</chapter>

doc/functions.xml

@@ -10,8 +10,6 @@
  <xi:include href="functions/overrides.xml" />
  <xi:include href="functions/generators.xml" />
  <xi:include href="functions/debug.xml" />
- <xi:include href="functions/fetchers.xml" />
- <xi:include href="functions/trivial-builders.xml" />
  <xi:include href="functions/fhs-environments.xml" />
  <xi:include href="functions/shell.xml" />
  <xi:include href="functions/dockertools.xml" />

doc/manual.xml

@@ -21,7 +21,9 @@
   <xi:include href="platform-notes.xml" />
  </part>
  <part>
-  <title>Languages, frameworks and packages</title>
+  <title>Builders</title>
+  <xi:include href="builders/fetchers.xml" />
+  <xi:include href="builders/trivial-builders.xml" />
   <xi:include href="languages-frameworks/index.xml" />
   <xi:include href="packages/index.xml" />
  </part>