Add index term for backup manifest in documentation.
Author: Fujii Masao
Discussion:
<chapter id="backup-manifest-format">
<title>Backup Manifest Format</title>
+ <indexterm>
+ <primary>Backup Manifest</primary>
+ </indexterm>
+
<para>
The backup manifest generated by <xref linkend="app-pgbasebackup" /> is
primarily intended to permit the backup to be verified using
