limit addon only stuff to server info screen

quite honestly everything else is awful and i dont want to bother with it

src/d_clisrv.c

@@ -100,6 +100,10 @@ static int map_icon_request_count; // current count of icon requests sent
 static UINT8 *map_icon_data;
 static patch_t *map_icon;
 
+// if true, signals the game to only load addons AND gamestate
+// instead of fully joining a server
+static boolean cl_addonsonly = false;
+
 plrinfo playerinfo[MAXPLAYERS] = {};
 SINT8 joinnode = 0; // used for CL_VIEWSERVER
 
@@ -1438,6 +1442,7 @@ static void CL_DrawConnectionStatus(void)
 			// Buttons
 			V_DrawFill(8, BASEVIDHEIGHT - 14, BASEVIDWIDTH - 16, 12, 239);
 			V_DrawThinString(16, BASEVIDHEIGHT - 12, V_ALLOWLOWERCASE, va("[%sESC%s] = Abort", "\x82", "\x80"));
+			V_DrawCenteredThinString(BASEVIDWIDTH/2, BASEVIDHEIGHT - 12, V_ALLOWLOWERCASE, va("[%sSPACE%s] = Load Addons", "\x82", "\x80"));
 			V_DrawRightAlignedThinString(BASEVIDWIDTH - 12, BASEVIDHEIGHT - 12, V_ALLOWLOWERCASE, va("[%sENTER%s] = Join", "\x82", "\x80"));
 		}
 		else if (filedownload.current != -1)
@@ -2579,7 +2584,7 @@ static boolean CL_ServerConnectionSearchTicker(tic_t *asksent)
 				return true;
 			}
 
-			cl_mode = (cv_serverinfoscreen.value) ? CL_VIEWSERVER : CL_CHECKFILES;
+			cl_mode = cv_serverinfoscreen.value ? CL_VIEWSERVER : CL_CHECKFILES;
 		}
 		else
 		{
@@ -2600,6 +2605,17 @@ static boolean CL_ServerConnectionSearchTicker(tic_t *asksent)
 	return true;
 }
 
+static void FreeMapIcon(void)
+{
+	if (map_icon != NULL)
+		Patch_Free(map_icon);
+	map_icon = NULL;
+	if (map_icon_data != NULL)
+		Z_Free(map_icon_data);
+	map_icon_data = NULL;
+	map_icon_request_count = 0;
+}
+
 /** Called by CL_ConnectToServer
   *
   * \param tmpsave The name of the gamestate file???
@@ -2624,7 +2640,7 @@ static boolean CL_ServerConnectionTicker(const char *tmpsave, tic_t *oldtic, tic
 
 		case CL_ASKFULLFILELIST:
 			if (cl_lastcheckedfilecount == UINT16_MAX) // All files retrieved
-				cl_mode = (cv_serverinfoscreen.value) ? CL_VIEWSERVER : CL_CHECKFILES;
+				cl_mode = cv_serverinfoscreen.value ? CL_VIEWSERVER : CL_CHECKFILES;
 			else if (fileneedednum != cl_lastcheckedfilecount || I_GetTime() >= *asksent)
 			{
 				if (CL_AskFileList(fileneedednum))
@@ -2757,7 +2773,19 @@ static boolean CL_ServerConnectionTicker(const char *tmpsave, tic_t *oldtic, tic
 			{
 				// Gamestate is now handled within CL_LoadReceivedSavegame()
 				CL_LoadReceivedSavegame(false);
+
+				if (cl_addonsonly)
+				{
+					// close connection after savegame load
+					// we want the actual server state
+					// in case theres some stuff like records to be synched
+					cl_mode = CL_ABORTED;
+				}
+				else
+				{
 					cl_mode = CL_CONNECTED;
+				}
+
 				break;
 			} // don't break case continue to CL_CONNECTED
 			else
@@ -2771,7 +2799,6 @@ static boolean CL_ServerConnectionTicker(const char *tmpsave, tic_t *oldtic, tic
 		case CL_ABORTED:
 			cl_mode = CL_SEARCHING;
 			return false;
-
 	}
 
 	GetPackets();
@@ -2793,24 +2820,21 @@ static boolean CL_ServerConnectionTicker(const char *tmpsave, tic_t *oldtic, tic
 		{
 			if (key == KEY_ENTER || key == KEY_JOY1)
 			{
+				cl_addonsonly = false;
 				cl_mode = CL_CHECKFILES;
-				if (map_icon != NULL)
+				FreeMapIcon();
-					Patch_Free(map_icon);
-				map_icon = NULL;
-				if (map_icon_data != NULL)
-					Z_Free(map_icon_data);
-				map_icon_data = NULL;
 			}
 			else if (key == KEY_ESCAPE || key == KEY_JOY1+1)
 			{
 				cl_mode = CL_ABORTED;
-				if (map_icon != NULL)
+				cl_addonsonly = false;
-					Patch_Free(map_icon);
+				FreeMapIcon();
-				map_icon = NULL;
+			}
-				if (map_icon_data != NULL)
+			else if (key == KEY_SPACE || key == KEY_JOY1+2)
-					Z_Free(map_icon_data);
+			{
-				map_icon_data = NULL;
+				cl_addonsonly = true;
-				map_icon_request_count = 0;
+				cl_mode = CL_CHECKFILES;
+				FreeMapIcon();
 			}
 		}
 
@@ -2819,6 +2843,7 @@ static boolean CL_ServerConnectionTicker(const char *tmpsave, tic_t *oldtic, tic
 		{
 			CONS_Printf(M_GetText("Network game synchronization aborted.\n"));
 			CL_AbortConnection();
+			cl_addonsonly = false;
 
 			return false;
 		}

src/m_menu.c

@@ -1305,12 +1305,21 @@ boolean M_Responder(event_t *ev)
 	{
 		playback_last_menu_interaction_leveltime = leveltime;
 		// Flip left/right with up/down for the playback menu, since it's a horizontal icon row.
+
 		switch (ch)
 		{
-			case KEY_LEFTARROW: ch = KEY_UPARROW; break;
+			case KEY_LEFTARROW:
-			case KEY_UPARROW: ch = KEY_RIGHTARROW; break;
+				ch = KEY_UPARROW;
-			case KEY_RIGHTARROW: ch = KEY_DOWNARROW; break;
+				break;
-			case KEY_DOWNARROW: ch = KEY_LEFTARROW; break;
+			case KEY_UPARROW:
+				ch = KEY_RIGHTARROW;
+				break;
+			case KEY_RIGHTARROW:
+				ch = KEY_DOWNARROW;
+				break;
+			case KEY_DOWNARROW:
+				ch = KEY_LEFTARROW;
+				break;
 
 			// arbitrary keyboard shortcuts because fuck you
 
@@ -1361,7 +1370,8 @@ boolean M_Responder(event_t *ev)
 					G_AdjustView(4, 1, true);
 				break;
 
-			default: break;
+			default:
+				break;
 		}
 	}
 
@@ -1486,6 +1496,7 @@ boolean M_Responder(event_t *ev)
 			}
 
 			return false;
+			break;
 
 		default:
 			CON_Responder(ev);
@@ -10046,7 +10057,6 @@ static void M_DrawVideoMode(void)
 			va("Wait %d second%s", testtime, (testtime > 1) ? "s" : ""));
 		M_CentreText(OP_VideoModeDef.y + 158,
 			"or press ESC to return");
-
 	}
 	else
 	{