Call SET varaiables "configuration_parameter"s in the documentation.

doc/src/sgml/ref/alter_role.sgml

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 PostgreSQL documentation
 -->
 
@@ -36,8 +36,8 @@ where <replaceable class="PARAMETER">option</replaceable> can be:
 
 ALTER ROLE <replaceable class="PARAMETER">name</replaceable> RENAME TO <replaceable>newname</replaceable>
 
-ALTER ROLE <replaceable class="PARAMETER">name</replaceable> SET <replaceable>varname</replaceable> { TO | = } { <replaceable>value</replaceable> | DEFAULT }
-ALTER ROLE <replaceable class="PARAMETER">name</replaceable> RESET <replaceable>varname</replaceable>
+ALTER ROLE <replaceable class="PARAMETER">name</replaceable> SET <replaceable>configuration_parameter</replaceable> { TO | = } { <replaceable>value</replaceable> | DEFAULT }
+ALTER ROLE <replaceable class="PARAMETER">name</replaceable> RESET <replaceable>configuration_parameter</replaceable>
 </synopsis>
  </refsynopsisdiv>
 
@@ -143,7 +143,7 @@ ALTER ROLE <replaceable class="PARAMETER">name</replaceable> RESET <replaceable>
      </varlistentry>
 
      <varlistentry>
-      <term><replaceable>varname</replaceable></term>
+      <term><replaceable>configuration_parameter</replaceable></term>
       <term><replaceable>value</replaceable></term>
       <listitem>
        <para>

doc/src/sgml/ref/alter_user.sgml

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@@ -36,8 +36,8 @@ where <replaceable class="PARAMETER">option</replaceable> can be:
 
 ALTER USER <replaceable class="PARAMETER">name</replaceable> RENAME TO <replaceable>newname</replaceable>
 
-ALTER USER <replaceable class="PARAMETER">name</replaceable> SET <replaceable>varname</replaceable> { TO | = } { <replaceable>value</replaceable> | DEFAULT }
-ALTER USER <replaceable class="PARAMETER">name</replaceable> RESET <replaceable>varname</replaceable>
+ALTER USER <replaceable class="PARAMETER">name</replaceable> SET <replaceable>configuration_parameter</replaceable> { TO | = } { <replaceable>value</replaceable> | DEFAULT }
+ALTER USER <replaceable class="PARAMETER">name</replaceable> RESET <replaceable>configuration_parameter</replaceable>
 </synopsis>
  </refsynopsisdiv>
 

doc/src/sgml/ref/reset.sgml

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 PostgreSQL documentation
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@@ -20,7 +20,7 @@ PostgreSQL documentation
 
  <refsynopsisdiv>
 <synopsis>
-RESET <replaceable class="PARAMETER">varname</replaceable>
+RESET <replaceable class="PARAMETER">configuration_parameter</replaceable>
 RESET ALL
 </synopsis>
  </refsynopsisdiv>
@@ -33,7 +33,7 @@ RESET ALL
    default values.  <command>RESET</command> is an alternative
    spelling for
 <synopsis>
-SET <replaceable class="parameter">varname</replaceable> TO DEFAULT
+SET <replaceable class="parameter">configuration_parameter</replaceable> TO DEFAULT
 </synopsis>
    Refer to <xref linkend="sql-set" endterm="sql-set-title"> for
    details.
@@ -62,7 +62,7 @@ SET <replaceable class="parameter">varname</replaceable> TO DEFAULT
 
   <variablelist>
    <varlistentry>
-    <term><replaceable class="PARAMETER">varname</replaceable></term>
+    <term><replaceable class="PARAMETER">configuration_parameter</replaceable></term>
     <listitem>
      <para>
       The name of a run-time parameter. See <xref linkend="sql-set"

doc/src/sgml/ref/set.sgml

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 PostgreSQL documentation
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@@ -20,7 +20,7 @@ PostgreSQL documentation
 
  <refsynopsisdiv>
 <synopsis>
-SET [ SESSION | LOCAL ] <replaceable class="PARAMETER">varname</replaceable> { TO | = } { <replaceable class="PARAMETER">value</replaceable> | '<replaceable class="PARAMETER">value</replaceable>' | DEFAULT }
+SET [ SESSION | LOCAL ] <replaceable class="PARAMETER">configuration_parameter</replaceable> { TO | = } { <replaceable class="PARAMETER">value</replaceable> | '<replaceable class="PARAMETER">value</replaceable>' | DEFAULT }
 SET [ SESSION | LOCAL ] TIME ZONE { <replaceable class="PARAMETER">timezone</replaceable> | LOCAL | DEFAULT }
 </synopsis>
  </refsynopsisdiv>
@@ -91,7 +91,7 @@ SET [ SESSION | LOCAL ] TIME ZONE { <replaceable class="PARAMETER">timezone</rep
    </varlistentry>
 
    <varlistentry>
-    <term><replaceable class="PARAMETER">varname</replaceable></term>
+    <term><replaceable class="PARAMETER">configuration_parameter</replaceable></term>
     <listitem>
      <para>
       Name of a settable run-time parameter.  Available parameters are