eduke32 wrapper for megaton edition compatibility

                // Megaton Edition compatibility layer
                // put this into game.c inside CommandLine function right after debughelp
                // TODO:
                // 1) replace hardcoded names of files and indexes with
                // ini\cfg configurable stuff. My original AutoIt wrapper code for reference
                /*
                Global $Ini = "duke3d.ini"
                Global $Global = "Global"
                Global $Filter = "-addon"
                Global $AddonIndex = 0
                Global $Title = "Duke Nukem 3D"
                Global $Exe = "eduke32.exe"
                Global $Args
                Global $WinState = 1

                GetIniSettings(1)
                GetCmdLine()
                GetIniSettings(2)
                RunDuke3D()
                Exit

                Func GetCmdLine()
                    If $CmdLine[0] > 0 Then
                        If $CmdLine[1] = $Filter Then
                            ;MsgBox(4096, $Title, $CmdLine[1])
                            If $CmdLine[2] = True Then
                                Global $AddonIndex = $CmdLine[2]
                            EndIf
                        EndIf
                    EndIf
                EndFunc   ;==>GetCmdLine

                Func GetIniSettings($Mode)
                    If FileExists($Ini) Then
                        If $Mode = 1 Then
                            Global $ModeSettings = IniReadSection($Ini, $Global)
                            For $m = 1 To $ModeSettings[0][0]
                                If $ModeSettings[$m][0] = "Filter" Then
                                    If $ModeSettings[$m][1] = True Then
                                        Global $Filter = $ModeSettings[$m][1]
                                    EndIf
                                EndIf
                            Next
                        ElseIf $Mode = 2 Then
                            Global $ModeSettings = IniReadSection($Ini, $AddonIndex)
                            For $m = 1 To $ModeSettings[0][0]
                                If $ModeSettings[$m][0] = "Title" Then
                                    If $ModeSettings[$m][1] = True Then
                                        Global $Title = $ModeSettings[$m][1]
                                    EndIf
                                ElseIf $ModeSettings[$m][0] = "Exe" Then
                                    If $ModeSettings[$m][1] = True Then
                                        Global $Exe = $ModeSettings[$m][1]
                                    EndIf
                                ElseIf $ModeSettings[$m][0] = "Args" Then
                                    If $ModeSettings[$m][1] = True Then
                                        Global $Args = $ModeSettings[$m][1]
                                    EndIf
                                ElseIf $ModeSettings[$m][0] = "WinState" Then
                                    If $ModeSettings[$m][1] = True Then
                                        Global $WinState = $ModeSettings[$m][1]
                                    EndIf
                                EndIf
                            Next
                        EndIf
                    EndIf
                    ;MsgBox(4096, $Title, $Exe & ' ' & $Args)
                EndFunc   ;==>GetIniSettings

                Func RunDuke3D()
                    RunWait($Exe & ' ' & $Args, @WorkingDir, $WinState)
                EndFunc   ;==>RunDuke3D
                */
                // 2) rename saves name pattern and ext for compatibility with Steam Cloud
                // to do so probably g_addonIndex should be used to differ names of saves according to addon index
                // give original duke3d 0 index, backward compatibility with old save names and ext should be added,
                // we dont want to frustrate people by making their old saves invisible, dont we?
                // also steam cloud storage size per D3DME could be limited.
                // i have idea to make dirty trick that will rename Megaton edition compatible saves to eduke32 format
                // on start, and on exit will rename them back to megaton format to let steam hook these saves.
                // from Russia with love, v00d00m4n
                // sorry for some garbage comments, im total n00b here, remove if you will annoy you
                if (!Bstrcasecmp(c+1,"addon"))
                {
                    if (argc > i+1)
                    {
                        switch (argv[i+1])
                        {
                                // better to do it with for loop for ulimited number of addons but for now 3 will do
                            case "1":
                                // settings should be equal to
                                // -jAddons -gDUKEDC.GRP -xGAME.CON
                                // not sure if last con needed, added it just in case to be sure that con loaded from addon grp and not default one
                                // def added just in case for mod compatibility and separation of addon def files!
                                // Will missing def interrupt eduke loading?
                                G_AddPath("Addons")
                                G_AddGroup("DUKEDC.GRP")
                                clearScriptNamePtr();
                                g_scriptNamePtr = dup_filename("GAME.CON");
                                initprintf("Using CON file \"%s\".\n",g_scriptNamePtr);
                                clearDefNamePtr();
                                g_defNamePtr = dup_filename("dukedc.def");
                                initprintf("Using DEF file \"%s\".\n",g_defNamePtr);
                                i++;
                                break;
                            case "2":
                                // settings should be equal to
                                // -jAddons -gNWINTER.GRP -xNWINTER.CON
                                // this case is different due of non standard con name
                                G_AddPath("Addons")
                                G_AddGroup("NWINTER.GRP")
                                clearScriptNamePtr();
                                g_scriptNamePtr = dup_filename("NWINTER.CON");
                                initprintf("Using CON file \"%s\".\n",g_scriptNamePtr);
                                clearDefNamePtr();
                                g_defNamePtr = dup_filename("nwinter.def");
                                initprintf("Using DEF file \"%s\".\n",g_defNamePtr);
                                i++;
                                break;
                            case "3":
                                // settings should be equal to
                                // -jAddons -gVACATION.GRP -xGAME.CON
                                // same as with DC
                                G_AddPath("Addons")
                                G_AddGroup("VACATION.GRP")
                                clearScriptNamePtr();
                                g_scriptNamePtr = dup_filename("GAME.CON");
                                initprintf("Using CON file \"%s\".\n",g_scriptNamePtr);
                                clearDefNamePtr();
                                g_defNamePtr = dup_filename("vacation.def");
                                initprintf("Using DEF file \"%s\".\n",g_defNamePtr);
                                i++;
                                break;
                        }
                        //i++;
                    }
                    i++;
                    continue;
                }
                // compat layer end