Adds a hardcoded connectionS idle timeout to pen (only for mainloop_select)
see http://siag.nu/hypermail/pen/0464.html
--- pen.c	2008-05-03 09:29:36.000000000 +0200
+++ pen.c-cnoSto	2009-02-07 16:34:00.000000000 +0100
@@ -2044,6 +2044,10 @@
 
 	loopflag = 1;
 
+	time_t lastcnSToloop = time(NULL);
+	int fdisset = 0;
+	unsigned int cnstoloop = 0;
+
 	if (debuglevel) debug("mainloop_select()");
 	while (loopflag) {
 		int n;
@@ -2150,33 +2154,53 @@
 		}
 
 		/* check sockets from open connections */
+			/* activate ConnectionS Timeout Loop only every ~ 120 secs */
+		if ( (lastcnSToloop + 120) < time(NULL) ) { lastcnSToloop = time(NULL); cnstoloop = 1; } else { cnstoloop = 0; }
 		for (i = 0; i < connections_max; i++) {
+			fdisset = 0;
 			if (conns[i].downfd == -1) continue;
 			if (FD_ISSET(conns[i].downfd, &w_read)) {
+				fdisset = 1;
 				if (copy_up(i) < 0) {
 					close_conn(i);
 					continue;
 				}
 			}
 			if (FD_ISSET(conns[i].upfd, &w_read)) {
+				fdisset = 1;
 				if (copy_down(i) < 0) {
 					close_conn(i);
 					continue;
 				}
 			}
 			if (FD_ISSET(conns[i].downfd, &w_write)) {
+				fdisset = 1;
 				if (flush_down(i) < 0) {
 					close_conn(i);
 					continue;
 				}
 			}
 			if (FD_ISSET(conns[i].upfd, &w_write)) {
+				fdisset = 1;
 				if (flush_up(i) < 0) {
 					close_conn(i);
 					continue;
 				}
 			}
-		}
+			if (cnstoloop == 1 && fdisset == 0) { /* Only when flag is set && only when no "action"
+							         happend within the last loop */
+			    /* lastcnSToloop is already "now" */
+			    int TOage = ((int)(lastcnSToloop-clients[conns[i].clt].last));
+			    if ( TOage > 75) {
+                              debug("closing conn %d due to age ~ %ld (client %d ip %s server %d pendd %d pendu %d)", i, TOage,
+                                     conns[i].clt, inet_ntoa(clients[conns[i].clt].addr), conns[i].index,
+                                     conns[i].downn, conns[i].upn
+                              );
+                              close_conn(i);
+                            }
+                        }
+                }
+		cnstoloop = 0;
 	}
 }