vty reference manuals are lacking node name/description
libosmocore/doc/vty/merge_doc.xsl works fine for merging in additional description or other elements for "commands", but it seems to fail for "nodes".
This results in section headings and descriptions missing, see e.g. the OsmoGGSN/vty/ggsn_vty_additions.xml or the same for SGSN and all other programs.
I'm not entirely sure if it was ever working, but in any case it needs to be fixed one way or another. I'm not good with XSLT. Feel free to ask around in the sysmocom team who feels most confident about this in case of questions.