Binary package “apache2-dbg” in ubuntu xenial

Apache debugging symbols

 The Apache HTTP Server Project's goal is to build a secure, efficient and
 extensible HTTP server as standards-compliant open source software. The
 result has long been the number one web server on the Internet.
 This package includes the debugging symbols. It can be used to debug
 crashing server instances and modules. See
 /usr/share/doc/apache2/README.backtrace for more information.