has a line:
(autoload 'sgml-mode "psgml" "Major mode for editing SGML." t)
but the psgml package also provides xml-mode, which is not currently
accessible (in the psgml-1.2.1-8 package). fix this by adding the line:
(autoload 'xml-mode "psgml" "Major mode for editing XML." t)
Fixed psgml-1.2.1-10 in rawhide.