Enable std-options

With this automake option, "make distcheck" will also require the binary
to write text to stdout and exit with code 0 when called with --version
and --help. This way we get a free (but fairly basic) runtime check.
Also, use the AC_COPYRIGHT macro instead of a comment.

configure.ac

@@ -1,12 +1,12 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-# Copyright (C) 2007 Stelios Bounanos, M0GLD (m0gld AT enotty DOT net)
+AC_COPYRIGHT([Copyright (C) 2007 Stelios Bounanos, M0GLD (m0gld AT enotty DOT net)])
 
 AC_PREREQ(2.61)
 AC_INIT([fldigi], [2.08G], [w1hkj AT w1hkj DOT com])
 AC_CONFIG_AUX_DIR([build-aux])
-AM_INIT_AUTOMAKE([-Wall foreign 1.9.6])
+AM_INIT_AUTOMAKE([-Wall foreign std-options 1.9.6])
 AM_MAINTAINER_MODE
 AC_CONFIG_SRCDIR([src/main.cxx])
 AC_CONFIG_HEADER([src/config.h])

src/main.cxx

@@ -519,11 +519,11 @@ int parse_args(int argc, char **argv, int& idx)
 			return 2;
 #endif // USE_PORTAUDIO
 		case OPT_HELP:
-			cerr << option_help;
+			cout << option_help;
 			exit(EXIT_SUCCESS);
 
 		case OPT_VERSION:
-			cerr << version_text;
+			cout << version_text;
 			exit(EXIT_SUCCESS);
 
 		case '?':