GCC document link broken and some document questions

[Qun-Ying <zhu dot qunying at gmail dot com>]

Hi,

I found that links for the "GNAT User's Guide"  are broken for version
4.8.4 and 4.9.2.

The links are
https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gnat_ugn_unw/ and
https://gcc.gnu.org/onlinedocs/gcc-4.8.4/gnat_ugn_unw/

There are links to the guide at

https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gnat_ugn/
and
https://gcc.gnu.org/onlinedocs/gcc-4.8.4/gnat_ugn/

But the documents there have some texinfo left over (HTML only, PDF seems OK)

And all the rest of the links to the PDF/PostSCript or HTML  tarball
have the same problem, need to remove "_unw" from the filename

Also for GCC 4.9.2:
https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gnat_ugn/Switches-for-gcc.html#Switches-for-gcc

It mention the flag "-fdump-xref", but it does not work:
cc1: error: unrecognized command line option â-fdump-xrefâ
Seems a mismatch in document.

For the generated PDF and PS files, I am not sure why it puts the
table of content at the end of the file. It defects its purpose.

Thanks

-- 
Qun-Ying