[sr-dev] got these docbook errors today

got these docbook errors today when building latest master on debian stretch. -- juha usr/bin/docbook2x-man -s ../../../doc/stylesheets/serdoc2man.xsl auth.xml auth.xml:7: warning: failed to load external entity "../../../../doc/docbook/entities.xml" %docentities; ^ Entity: line 1: %docentities; ^ auth.xml:25: parser error : Entity 'kamailio' not defined The <command>auth</command> module of &kamailio; provides basic functional ^ auth.xml:208: parser error : Entity 'kamailio' not defined can be divided into several partitions. Each &kamailio; process is assig ^ auth.xml:213: parser error : Entity 'kamailio' not defined conditions. In the worst case, when only one &kamailio; process receive ^ auth.xml:532: parser error : Entity 'kamailio' not defined separated by a comma. For challenges generated by &kamailio;, this ^ auth.xml:535: parser error : Entity 'kamailio' not defined parameter will be present in challenges created by &kamailio;. This may ^ auth.xml:537: parser error : Entity 'kamailio' not defined make your &kamailio; not comply with RFC 3261. ^