more Groff documentation navigation fixes

[ropers]

I think I forgot to send the below, unless I'm totally confused.
Not diffs this time, because I drafted these earlier:


In groff.texi, line 4059 appears to omit the "Next" entry.  It currently says:
@node ms Footnotes, , ms Insertions, ms Body Text
I suspect the correct form might be:
@node ms Footnotes, ms language and localization, ms Insertions, ms Body Text


Likewise line 4636:
@node Missing Unix Version 7 ms Macros, , Differences from AT&T ms,
Differences from AT&T ms
should probably say:
@node Missing Unix Version 7 ms Macros, ms Legacy Features,
Differences from AT&T ms, Differences from AT&T ms


Thanks and regards,
Ian

(Ian Ropers)