document ITS#4546 "single-conn" feature

doc/man/man5/slapd-ldap.5

@@ -313,6 +313,10 @@ used by the client, otherwise the requested protocol is used.
 The proxy returns \fIunwillingToPerform\fP if an operation that is 
 incompatible with the requested protocol is attempted.
 
+.TP
+.B single\-conn {NO|yes}
+Discards current cached connection when the client rebinds.
+
 .TP
 .B proxy\-whoami {NO|yes}
 Turns on proxying of the WhoAmI extended operation. If this option is

doc/man/man5/slapd-meta.5

@@ -148,6 +148,10 @@ identity to be deferred until actually needed by subsequent operations.
 If this option is given, the client's bind credentials are remembered
 for rebinds when chasing referrals.
 
+.TP
+.B single\-conn {NO|yes}
+Discards current cached connection when the client rebinds.
+
 .SH TARGET SPECIFICATION
 Target specification starts with a "uri" directive: