Add ioquake3 vstr/nextdemo support

doc/040_cvarlist.md

@@ -129,6 +129,11 @@ it's `+set busywait 0` (setting the `busywait` cvar) and `-portable`
   spawned in maps (in fact, some official Ground Zero maps contain
   these entities). This cvar is set to 0 by default.
 
+* **nextdemo**: Defines the next command to run after maps from the
+  `nextserver` list. By default this is set to the empty string.
+
+* **nextserver**: Used for looping the introduction demos.
+
 ## Audio
 
 * **al_device**: OpenAL device to use. In most cases there's no need to

doc/050_commands.md

@@ -21,3 +21,5 @@ original clients (Vanilla Quake II) commands are still in place.
 * **listmaps**: Lists available maps for the player to load. Maps from
   loaded pak files will be listed first followed by maps placed in 
   the current game's maps folder.
+
+* **vstr**: Inserts the current value of a variable as command text.

src/common/cmdparser.c

@@ -366,6 +366,9 @@ Cbuf_AddLateCommands(void)
 	return ret;
 }
 
+/*
+ * Execute a script file
+ */
 void
 Cmd_Exec_f(void)
 {
@@ -401,6 +404,21 @@ Cmd_Exec_f(void)
 	FS_FreeFile(f);
 }
 
+/*
+ * Inserts the current value of a variable as command text
+ */
+void Cmd_Vstr_f( void ) {
+	const char	*v;
+
+	if (Cmd_Argc() != 2) {
+		Com_Printf("vstr <variablename> : execute a variable command\n");
+		return;
+	}
+
+	v = Cvar_VariableString(Cmd_Argv(1));
+	Cbuf_InsertText(va("%s\n", v));
+}
+
 /*
  * Just prints the rest of the line to the console
  */
@@ -1111,6 +1129,7 @@ Cmd_Init(void)
 	/* register our commands */
 	Cmd_AddCommand("cmdlist", Cmd_List_f);
 	Cmd_AddCommand("exec", Cmd_Exec_f);
+	Cmd_AddCommand("vstr", Cmd_Vstr_f);
 	Cmd_AddCommand("echo", Cmd_Echo_f);
 	Cmd_AddCommand("alias", Cmd_Alias_f);
 	Cmd_AddCommand("wait", Cmd_Wait_f);

src/server/sv_init.c

@@ -440,7 +440,10 @@ SV_Map(qboolean attractloop, char *levelstring, qboolean loadgame)
 	}
 	else
 	{
-		Cvar_Set("nextserver", "");
+		// use next demo command if list of map commands as empty
+		Cvar_Set("nextserver", (char*)Cvar_VariableString("nextdemo"));
+		// and cleanup nextdemo
+		Cvar_Set("nextdemo", "");
 	}
 
 	/* hack for end game screen in coop mode */