Bye bye flag_const_strings

[Gabriel Dos Reis]

Hi,

  One of the thing I've learnt over the week-end is that the option
code confusion

     http://gcc.gnu.org/ml/gcc-patches/2006-02/msg00326.html

is partly caused by a conflicting interests between -fconst-strings
and -Wwrite-strings.  The former has been deprecated for a long time
now.  I would like to remove it.  Objections?

-- Gaby