ITS#8635 - Note that non-zero serverID's are required for MMR, and that...

ITS#8635 - Note that non-zero serverID's are required for MMR, and that serverID 0 is specific to single master replication only

doc/man/man5/slapd-config.5

@@ -747,15 +747,16 @@ size allowed.  0 disables security layers.  The default is 65536.
 Specify an integer ID from 0 to 4095 for this server (limited
 to 3 hexadecimal digits).  The ID may also be specified as a
 hexadecimal ID by prefixing the value with "0x".
-These IDs are
+Non-zero IDs are
 required when using multimaster replication and each master must have a
-unique ID. Note that this requirement also applies to separate masters
+unique non-zero ID. Note that this requirement also applies to separate masters
 contributing to a glued set of databases.
 If the URL is provided, this directive may be specified
 multiple times, providing a complete list of participating servers
 and their IDs. The fully qualified hostname of each server should be
 used in the supplied URLs. The IDs are used in the "replica id" field
-of all CSNs generated by the specified server. The default value is zero.
+of all CSNs generated by the specified server. The default value is zero, which
+is only valid for single master replication.
 Example:
 .LP
 .nf

doc/man/man5/slapd.conf.5

@@ -937,15 +937,16 @@ e.g. ldapi:// (and eventually IPSEC).  It is not normally used.
 Specify an integer ID from 0 to 4095 for this server (limited
 to 3 hexadecimal digits).  The ID may also be specified as a
 hexadecimal ID by prefixing the value with "0x".
-These IDs are
+Non-zero IDs are
 required when using multimaster replication and each master must have a
-unique ID. Note that this requirement also applies to separate masters
+unique non-zero ID. Note that this requirement also applies to separate masters
 contributing to a glued set of databases.
 If the URL is provided, this directive may be specified
 multiple times, providing a complete list of participating servers
 and their IDs. The fully qualified hostname of each server should be
 used in the supplied URLs. The IDs are used in the "replica id" field
-of all CSNs generated by the specified server. The default value is zero.
+of all CSNs generated by the specified server. The default value is zero, which
+is only valid for single master replication.
 Example:
 .LP
 .nf