Package: x2goserver Version: 4.0.1.19-0x2go2+git20160126.1064+stretch.main.1

x2goserver depends on x2goagent which depends on nxagent which depends on libxcomp3 which depends on libpng12-0 which is flagged obsolete.

Please update packages dependency (and maybe adjust source) to depends only on libpng16-16 (version 1.6)

Thanks, Best Regards,

Thierry MURGUE.