Repair mimetype icon usage, part 1. The following are not fully verified in source as of this commit due to ubiquity: info, unknown

kde-tde/tde_mimetype_conversion

@@ -125,7 +125,7 @@ convert_files "man" "application-x-troff-man"
 convert_files "metafont" "application-x-metafont"
 convert_files "midi" "audio-midi"
 convert_files "misc" "application-vnd\.tde\.misc"
-convert_files "netscape_doc" ""
+convert_files "netscape_doc" "application-x-netscape"
 convert_files "pdf" "application-pdf"
 convert_files "pk" "application-x-tex-pk"
 convert_files "postscript" "application-postscript"