[sr-dev] got these docbook errors today

[Juha Heinanen]

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.
                            ^