Now clears rio_abortable flag during externals and restores after

(previously didn't matter, but now used in input_thread).
Disables Telnet binary receive mode after external
(solves problem of CR/LF parsing after upload or download).

src/sbbs3/xtrn.cpp

@@ -505,6 +505,10 @@ int sbbs_t::external(char* cmdline, long mode, char* startup_dir)
         ReleaseMutex(exec_mutex);
 	}
 
+	/* Disable Ctrl-C checking */
+	bool rio_abortable_save=rio_abortable;
+	rio_abortable=false;
+
     // Executing app, monitor
     retval=STILL_ACTIVE;
     while(1) {
@@ -726,6 +730,13 @@ int sbbs_t::external(char* cmdline, long mode, char* startup_dir)
 
 	curatr=0;	// Can't guarantee current attributes
 
+	rio_abortable=rio_abortable_save;	// Restore abortable state
+
+	/* Got back to Text/NVT mode */
+	sprintf(str,"%c%c%c",TELNET_IAC,TELNET_DONT,TELNET_BINARY);
+	putcom(str,3);
+	telnet_mode&=~TELNET_MODE_BIN_RX;
+
 //	lprintf("%s returned %d",realcmdline, retval);
 
 	return(retval);