Updating "regression hunting" to the Git world (was: [wwwdocs] Adjustments of "regression hunting" instructions to the post-SVN world.)

[Gerald Pfeifer]

On Sun, 19 Jan 2020, Gerald Pfeifer wrote (on gcc-patches@):
> With Git a clone carries the whole repository, so remove instructions
> on obtaining a local copy of the repository and related instructions
> on SVN usage.

I just updated https://gcc.gnu.org/bugs/reghunt.html , mostly by 
removing obsolete aspects related to SVN:

   https://gcc.gnu.org/ml/gcc-patches/2020-01/msg01121.html


If you have further updates to that page, please go ahead and 
simply make them (or let me know).


Also contrib/reghunt appears in need of *quite* some updates.  
Or do we want to retire it?

Gerald