Add comment concerning connections mutex. Need to analysis

locking requires and possibly restructure locking.

servers/slapd/connection.c

@@ -318,6 +318,8 @@ long connection_init(
 static void
 connection_destroy( Connection *c )
 {
+	/* note: connections_mutex should be locked by caller */
+
     assert( connections != NULL );
     assert( c != NULL );
     assert( c->c_struct_state != SLAP_C_UNUSED );
@@ -429,6 +431,8 @@ static void connection_close( Connection *c )
 	assert( c->c_struct_state == SLAP_C_USED );
 	assert( c->c_conn_state == SLAP_C_CLOSING );
 
+	/* note: connections_mutex should be locked by caller */
+
 	if( c->c_ops != NULL ) {
 		Debug( LDAP_DEBUG_TRACE,
 			"connection_close: deferring conn=%ld sd=%d.\n",