Update IRC server (Freenode -> Libera)

.travis.yml

@@ -85,7 +85,7 @@ script:
 notifications:
   irc:
     channels:
-      - "irc.freenode.org#megaglest"
+      - "irc.libera.chat#megaglest"
     skip_join: true
     use_notice: true
     on_success: change

docs/README.txt

@@ -215,7 +215,7 @@ network slots and the other players have to join.
 The best ways to find people to play a multi-player game are:
 a) using the Internet Game menu
 b) scheduling a game on the MegaGlest forums
-c) finding other players on the #megaglest-lobby IRC channel on irc.freenode.net.
+c) finding other players on the #megaglest-lobby IRC channel on irc.libera.chat.
 
 For LAN play, clients may click the 'Find LAN games' menu item to find servers
 with an open network slot on the local network (this uses UDP broadcasting).
@@ -281,6 +281,6 @@ their own by reading up on available documentation before getting in touch.
   http://forum.megaglest.org
 
 - Contact us on IRC:
-  Network: chat.freenode.net
+  Network: irc.libera.chat
   Channel: #megaglest
   Or use the webchat at http://chat.megaglest.org/

source/glest_game/facilities/game_util.cpp

@@ -212,16 +212,16 @@ string getAboutString1(int i) {
 	case 0: return "MegaGlest " + glestVersionString + " (" + "Shared Library " + sharedLibVersionString + ")";
 	case 1: return GIT_Rev;
 	case 2: return "Copyright 2001-2010 The Glest Team";
-	case 3: return "Copyright 2010-2017 The MegaGlest Team";
+	case 3: return "Copyright 2010-2021 The MegaGlest Team";
 	}
 	return "";
 }
 
 string getAboutString2(int i) {
 	switch(i) {
-	case 0: return "Web: http://megaglest.org";
+	case 0: return "Web: https://megaglest.org";
 	case 1: return "Bug reports: " + string(mailString);
-	case 2: return "IRC: irc://irc.freenode.net/megaglest";
+	case 2: return "IRC: irc://irc.libera.chat/megaglest";
 	}
 	return "";
 }

source/glest_game/menu/menu_state_masterserver.cpp

@@ -33,7 +33,7 @@ namespace Glest{ namespace Game{
 
 DisplayMessageFunction MenuStateMasterserver::pCB_DisplayMessage = NULL;
 
-static string IRC_SERVER   = "irc.freenode.net";
+static string IRC_SERVER   = "irc.libera.chat";
 static string IRC_CHANNEL  = "#megaglest-lobby";
 
 // =====================================================

source/masterserver

@@ -1 +1 @@
-Subproject commit c8717d3a5df60f623b454de020090cfededde149
+Subproject commit fda4f82d1eab1c23bbec351cdd2e0ba49c88b4fa