ITS#3837 mention back-hdb

doc/guide/admin/install.sdf

@@ -112,10 +112,10 @@ configure detects a usable Cyrus SASL installation.
 
 H3: Database Software
 
-OpenLDAP's {{slapd}}(8) primary database backend, {{TERM:BDB}},
-requires {{ORG[expand]Sleepycat}} {{PRD:Berkeley DB}}.
+OpenLDAP's {{slapd}}(8) {{TERM:BDB}} and {{TERM:HDB}} primary database backends
+require {{ORG[expand]Sleepycat}} {{PRD:Berkeley DB}}.
 If not available at configure time, you will not be able build
-{{slapd}}(8) with this primary database backend.
+{{slapd}}(8) with these primary database backends.
 
 Your operating system may provide a supported version of
 {{PRD:Berkeley DB}} in the base system or as an optional
@@ -126,7 +126,7 @@ install it yourself.
 download page {{URL: http://www.sleepycat.com/download/}}.  There
 are several versions available.  Generally, the most recent release
 (with published patches) is recommended.  This package is required
-if you wish to use the {{TERM:BDB}} database backend.
+if you wish to use the {{TERM:BDB}} or {{TERM:HDB}} database backends.
 
 OpenLDAP's {{slapd}}(8) LDBM backend supports a variety of data
 base managers including {{PRD:Berkeley DB}} and {{PRD:GDBM}}.

doc/guide/admin/slapdconfig.sdf

@@ -236,6 +236,7 @@ supported backend types listed in Table 5.2.
 Types	Description
 bdb	Berkeley DB transactional backend
 dnssrv	DNS SRV backend
+hdb	Hierarchical variant of bdb backend
 ldap	Lightweight Directory Access Protocol (Proxy) backend
 ldbm	Lightweight DBM backend
 meta	Meta Directory backend
@@ -562,12 +563,14 @@ If specified multiple times, each {{TERM:URL}} is provided.
 >	updateref	ldap://master.example.net
 
 
-H3: BDB Database Directives
+H3: BDB and HDB Database Directives
 
-Directives in this category only apply to a {{TERM:BDB}} database.
-That is, they must follow a "database bdb" line and come before any
+Directives in this category only apply to both the {{TERM:BDB}}
+and the {{TERM:HDB}} database.
+That is, they must follow a "database bdb" or "database hdb" line
+and come before any
 subsequent "backend" or "database" line.  For a complete reference
-of BDB configuration directives, see {{slapd-bdb}}(5).
+of BDB/HDB configuration directives, see {{slapd-bdb}}(5).
 
 
 H4: directory <directory>