Make Ganesha version searchable in binary with strings

Also adjust the output of ganesha.nfsd -@

And add -v as an option that may be more expected

The following command will dump the version string:

strings /usr/bin/ganesha.nfsd | grep 'Ganesha Version'

Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>