How not to override existing file

[Sean MacLennan]

Hi,

I am a beginner to automake. I have setup a simple automake/autoconf
for the GoFish project <http://gofish.sourceforge.net>. The project
has a .conf file. I have the following line in the Makefile.am:

  sysconf_DATA = gofish.conf

This works great at installing the conf file. Now I want to change it
so it will not overwrite an exiting file. Preferably, if the file does
not exist, it will be installed. If it does, the file will be
installed as gofish.conf.new but leave the old file alone.

Thanks,
   Sean MacLennan