client: set default hostname to 127.0.0.1 instead of localhost

This is to make sure chronyd will see the remote address as 127.0.0.1
and allow access even when localhost resolves to an address of a
non-loopback interface.

client.c

@@ -2729,7 +2729,7 @@ main(int argc, char **argv)
 {
   char *line;
   const char *progname = argv[0];
-  const char *hostname = "localhost";
+  const char *hostname = "127.0.0.1";
   const char *conf_file = DEFAULT_CONF_FILE;
   int quit = 0, ret = 1, multi = 0, auto_auth = 0, short_timeout = 1;
   int port = DEFAULT_CANDM_PORT;