optionally not store inputcommand into command history

inputcommand <init> <command> <prompt> <nopersist>

    Opens a custom console buffer with custom prompt, initial buffer text
    and execution script (which gets the input buffer content in alias
    cmdbuf). If nopersist is not zero, the command will not be stored in
    console history.

DOCREF inputcommand

source/src/console.cpp

@@ -82,7 +82,7 @@ struct console : consolebuffer<cline>
 console con;
 textinputbuffer cmdline;
 char *cmdaction = NULL, *cmdprompt = NULL;
-bool saycommandon = false;
+bool saycommandon = false, storeinputcommand = false;
 
 VARFP(maxcon, 10, 200, 1000, con.setmaxlines(maxcon));
 
@@ -313,13 +313,14 @@ void saycommand(char *init)                         // turns input to the comman
 }
 COMMAND(saycommand, "c");
 
-void inputcommand(char *init, char *action, char *prompt)
+void inputcommand(char *init, char *action, char *prompt, int *nopersist)
 {
     saycommand(init);
     if(action[0]) cmdaction = newstring(action);
     if(prompt[0]) cmdprompt = newstring(prompt);
+    storeinputcommand = cmdaction && !*nopersist;
 }
-COMMAND(inputcommand, "sss");
+COMMAND(inputcommand, "sssi");
 
 SVARFF(mapmsg,
 { // read mapmsg
@@ -395,6 +396,7 @@ struct hline
         DELETEA(cmdprompt);
         if(action) cmdaction = newstring(action);
         if(prompt) cmdprompt = newstring(prompt);
+        storeinputcommand = false;
     }
 
     bool shouldsave()
@@ -578,7 +580,11 @@ void consolekey(int code, bool isdown, int cooked, SDLMod mod)
             }
             histpos = history.length();
             saycommand(NULL);
-            if(h) h->run();
+            if(h)
+            {
+                h->run();
+                if(h->action && !storeinputcommand) history.drop();
+            }
         }
         else if((code==SDLK_ESCAPE && !ignoreescup) || code== SDL_AC_BUTTON_RIGHT)
         {