Bump copyright year and make easier to bump

(cherry picked from commit ae249c6)

configure.ac

@@ -2,6 +2,7 @@
 
 AC_PREREQ(2.65)
 AC_INIT([xrdp], [0.9.24], [[email protected]])
+AC_DEFINE([VERSION_YEAR], 2024, [Copyright year])
 AC_CONFIG_HEADERS(config_ac.h:config_ac-h.in)
 AM_INIT_AUTOMAKE([1.7.2 foreign])
 AC_CONFIG_MACRO_DIR([m4])

sesman/sesman.c

@@ -567,8 +567,9 @@ print_version(void)
 {
     g_writeln("xrdp-sesman %s", PACKAGE_VERSION);
     g_writeln("  The xrdp session manager");
-    g_writeln("  Copyright (C) 2004-2020 Jay Sorg, "
-              "Neutrino Labs, and all contributors.");
+    g_writeln("  Copyright (C) 2004-%d Jay Sorg, "
+              "Neutrino Labs, and all contributors.",
+              VERSION_YEAR);
     g_writeln("  See https://github.com/neutrinolabs/xrdp for more information.");
     g_writeln("%s", "");
 

xrdp/xrdp.c

@@ -55,8 +55,9 @@ print_version(void)
 {
     g_writeln("xrdp %s", PACKAGE_VERSION);
     g_writeln("  A Remote Desktop Protocol Server.");
-    g_writeln("  Copyright (C) 2004-2020 Jay Sorg, "
-              "Neutrino Labs, and all contributors.");
+    g_writeln("  Copyright (C) 2004-%d Jay Sorg, "
+              "Neutrino Labs, and all contributors.",
+              VERSION_YEAR);
     g_writeln("  See https://github.com/neutrinolabs/xrdp for more information.");
     g_writeln("%s", "");