diff -Naur old/polipo-1.0.2/client.c polipo-1.0.2/client.c
--- old/polipo-1.0.2/client.c	2007-08-27 04:02:22.000000000 +0700
+++ polipo-1.0.2/client.c	2007-09-18 14:45:15.000000000 +0700
@@ -22,6 +22,32 @@
 
 #include "polipo.h"
 
+#ifdef HV3_BUILD
+/*
+ * Magic first socket connection that controls the lifetime of this process.
+ */
+static int magic_fd = -1;
+static int
+magic_handler(int status, FdEventHandlerPtr event)
+{
+    int rc;
+    char zBuf[256];
+
+    errno = 0;
+    printf("magic_handler\n");
+    rc = READ(magic_fd, zBuf, 255);
+    printf("rc = %d errno = %d\n", rc, errno);
+    if (rc == 0 || (rc < 0 && errno != EAGAIN)) {
+        polipoExit();
+        return 1;
+    } else if (rc > 0) {
+        WRITE(magic_fd, zBuf, rc);
+    }
+
+    return 0;
+}
+#endif
+
 static int 
 httpAcceptAgain(TimeEventHandlerPtr event)
 {
@@ -69,7 +95,9 @@
             }
             return 1;
         } else {
+#ifndef HV3_BUILD
             polipoExit();
+#endif
             return 1;
         }
     }
@@ -92,6 +120,15 @@
     if(rc < 0) 
         do_log_error(L_WARN, errno, "Couldn't disable Nagle's algorithm");
 
+#ifdef HV3_BUILD
+    if(magic_fd < 0) {
+        do_log(D_CLIENT_CONN, "Accepted magic tcp/ip connection: %d\n", fd);
+        magic_fd = fd;
+        registerFdEvent(magic_fd, POLLIN|POLLERR, magic_handler, 0, 0);
+        return 0;
+    }
+#endif
+
     connection = httpMakeConnection();
 
     timeout = scheduleTimeEvent(clientTimeout, httpTimeoutHandler,
@@ -1095,6 +1132,13 @@
     int local, haveData;
     int rc;
 
+    int relax = relaxTransparency;
+#ifdef HV3_BUILD
+    if (request->cache_control.flags & CACHE_RELAX_TRANSPARENCY) {
+        relax = 2;
+    }
+#endif
+
     assert(!request->chandler);
 
     if(request->error_code) {
@@ -1102,7 +1146,7 @@
            request->object == NULL ||
            (request->object->flags & OBJECT_LOCAL) ||
            (request->object->flags & OBJECT_ABORTED) ||
-           (relaxTransparency < 1 && !proxyOffline)) {
+           (relax < 1 && !proxyOffline)) {
             if(serveNow) {
                 connection->flags |= CONN_WRITER;
                 return httpClientRawErrorHeaders(connection,
@@ -1179,13 +1223,13 @@
         validate = 0;
     else if((request->object->flags & OBJECT_FAILED) &&
             !(object->flags & OBJECT_INPROGRESS) &&
-            !relaxTransparency)
+            !relax)
         validate = 1;
     else if(request->method != METHOD_HEAD &&
             !objectHasData(object, request->from, request->to) &&
             !(object->flags & OBJECT_INPROGRESS))
         validate = 1;
-    else if(objectMustRevalidate((relaxTransparency <= 1 ? 
+    else if(objectMustRevalidate((relax <= 1 ? 
                                   request->object : NULL),
                                  &request->cache_control))
         validate = 1;
diff -Naur old/polipo-1.0.2/http_parse.c polipo-1.0.2/http_parse.c
--- old/polipo-1.0.2/http_parse.c	2007-08-27 04:02:22.000000000 +0700
+++ polipo-1.0.2/http_parse.c	2007-09-18 14:43:09.000000000 +0700
@@ -1127,6 +1127,11 @@
                     }
                     a = atoi(buf + v_start);
                     cache_control.max_stale = a;
+#ifdef HV3_BUILD
+                } else if(token_compare(buf, token_start, token_end,
+                                        "relax-transparency")) {
+                    cache_control.flags |= CACHE_RELAX_TRANSPARENCY;
+#endif
                 } else {
                     do_log(L_WARN, "Unsupported Cache-Control directive ");
                     do_log_n(L_WARN, buf + token_start, 
diff -Naur old/polipo-1.0.2/io.c polipo-1.0.2/io.c
--- old/polipo-1.0.2/io.c	2007-08-27 04:02:22.000000000 +0700
+++ polipo-1.0.2/io.c	2007-09-18 14:43:09.000000000 +0700
@@ -724,7 +724,9 @@
         return NULL;
     }
 
+#ifndef HV3_BUILD
     rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
+#endif
     if(rc < 0) do_log_error(L_WARN, errno, "Couldn't set SO_REUSEADDR");
 
     if(inet6) {
diff -Naur old/polipo-1.0.2/main.c polipo-1.0.2/main.c
--- old/polipo-1.0.2/main.c	2007-08-27 04:02:22.000000000 +0700
+++ polipo-1.0.2/main.c	2007-09-18 14:43:09.000000000 +0700
@@ -38,10 +38,16 @@
     fprintf(stderr, "  -c: specify the configuration file to use.\n");
 }
 
+static void print_port_msg(int port)
+{
+    fprintf(stdout, "polipo port is %d\n", port);
+    fflush(stdout);
+}
+
 int
 main(int argc, char **argv)
 {
-    FdEventHandlerPtr listener;
+    FdEventHandlerPtr listener = 0;
     int i;
     int rc;
     int expire = 0, printConfig = 0;
@@ -155,8 +161,23 @@
     if(pidFile)
         writePid(pidFile->string);
 
+#ifdef HV3_BUILD
+    do {
+        int p;
+        for(p = proxyPort; listener == 0 && p < (proxyPort + 50); p++) {
+            const char *zAddr = proxyAddress->string;
+            listener = create_listener((char *)zAddr, p, httpAccept, NULL);
+        }
+        if (listener) {
+            proxyPort = p - 1;
+            print_port_msg(proxyPort);
+        }
+    } while (0);
+#else
     listener = create_listener(proxyAddress->string, 
                                proxyPort, httpAccept, NULL);
+#endif
+
     if(!listener) {
         if(pidFile) unlink(pidFile->string);
         exit(1);
diff -Naur old/polipo-1.0.2/object.h polipo-1.0.2/object.h
--- old/polipo-1.0.2/object.h	2007-08-27 04:02:22.000000000 +0700
+++ polipo-1.0.2/object.h	2007-09-18 14:43:09.000000000 +0700
@@ -159,6 +159,16 @@
 /* set if this object should never be combined with another resource */
 #define CACHE_MISMATCH 4096
 
+/* The following flag is set in the CacheControlRec.flags bitmask if
+ * the custom "relax-transparency" directive was seen in a Cache-Control
+ * header received from a client. It is never forwarded to a parent
+ * cache or origin server.
+ *
+ * Note: The code that uses this symbol is only active if HV3_BUILD is
+ * defined at compile-time.
+ */
+#define CACHE_RELAX_TRANSPARENCY 4096
+
 struct _HTTPRequest;
 
 void preinitObject(void);
diff -Naur old/polipo-1.0.2/polipo.h polipo-1.0.2/polipo.h
--- old/polipo-1.0.2/polipo.h	2007-08-27 04:02:22.000000000 +0700
+++ polipo-1.0.2/polipo.h	2007-09-18 14:43:09.000000000 +0700
@@ -24,6 +24,9 @@
 #define _GNU_SOURCE
 #endif
 
+/* Build me the version with ad-hoc hv3 hooks */
+#define HV3_BUILD
+
 #include <sys/param.h>
 
 #ifdef __MINGW32_VERSION