Add support for external scripts.

doc/Makefile

@@ -0,0 +1,2 @@
+all:
+	@dune build @doc

doc/content/liq/liquidsoap

@@ -0,0 +1,4 @@
+#!/bin/sh
+# shellcheck disable=SC2068
+
+../../../liquidsoap $@

doc/content/liq/space_overhead.liq

@@ -0,0 +1,9 @@
+#!./liquidsoap
+# This code was contributed by AzuraCast. Possible settings:
+# - less memory: space_overhead = 20
+# - less cpu:    space_overhead = 140
+# - balanced:    space_overhead = 80
+
+# Optimize for memory usage over CPU: this results in a slightly increased CPU
+# usage and reduced memory usage.
+runtime.gc.set(runtime.gc.get().{space_overhead=20, allocation_policy=2})

doc/content/memory.md

@@ -28,20 +28,8 @@ Inside liquidsoap scripts, the operations that the OCaml compiler provides to co
 
 Typically, to change the garbage collector parameters, one can do:
 
-```liquidsoap
-# This code was contributed by AzuraCast:
-# Possible settings:
-# - less memory: space_overhead = 20
-# - less cpu: space_overhead = 140
-# - balanced: space_overhead = 80
-
-# Optimize for memory usage over CPU
-# This results in a slightly increased
-# CPU usage and reduced memory usage.
-runtime.gc.set(runtime.gc.get().{
-  space_overhead = 20,
-  allocation_policy = 2
-})
+```{.liquidsoap include="content/liq/space_overhead.liq" from=1}
+
 ```
 
 These parameters and functions make it possible to experiment and see if you can find better parameters for your application.