Bringing gdb.texinfo up to date with v5.1

[Eli Zaretskii]

gdb.texinfo currently says this:

   You can use @value{GDBN} to debug programs written in C and C++.
   For more information, see @ref{Support,,Supported languages}.
   For more information, see @ref{C,,C and C++}.
   [...]
   Support for Modula-2 and Chill is partial.  For information on Modula-2,
   see @ref{Modula-2,,Modula-2}.  For information on Chill, see @ref{Chill}.
   [...]
   Debugging Pascal programs which use sets, subranges, file variables, or
   nested functions does not currently work.  @value{GDBN} does not support
   entering expressions, printing values, or similar features using Pascal
   syntax.
   [...]
   @value{GDBN} can be used to debug programs written in Fortran, although
   it may be necessary to refer to some variables with a trailing
   underscore.

Is any of this still true when v5.1 is out?  If something here needs to 
be updated, please tell what that is.  Thanks.