manual: add NIX_CONF_DIR to conf-file section

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Daiderd Jordan 2016-12-16 10:59:07 +01:00
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@ -18,7 +18,8 @@
<refsection><title>Description</title>
<para>A number of persistent settings of Nix are stored in the file
<filename><replaceable>sysconfdir</replaceable>/nix/nix.conf</filename>.
<filename><replaceable>sysconfdir</replaceable>/nix/nix.conf</filename> or
<filename>$NIX_CONF_DIR/nix.conf</filename> if <envar>NIX_CONF_DIR</envar> is set.
This file is a list of <literal><replaceable>name</replaceable> =
<replaceable>value</replaceable></literal> pairs, one per line.
Comments start with a <literal>#</literal> character. Here is an example