http://bugs.gentoo.org/301312
http://savannah.gnu.org/bugs/index.php?26786
http://lists.gnu.org/archive/html/bug-wget/2009-03/msg00033.html

--- src/gnutls.c
+++ src/gnutls.c
@@ -45,6 +45,7 @@ as that of the covered work.  */
 #include "connect.h"
 #include "url.h"
 #include "ssl.h"
+#include "host.h"
 
 /* Note: some of the functions private to this file have names that
    begin with "wgnutls_" (e.g. wgnutls_read) so that they wouldn't be
@@ -181,7 +182,7 @@ static struct transport_implementation w
 };
 
 bool
-ssl_connect (int fd)
+ssl_connect (int fd, const char *hostname)
 {
   static const int cert_type_priority[] = {
     GNUTLS_CRT_X509, GNUTLS_CRT_OPENPGP, 0
@@ -189,8 +190,17 @@ ssl_connect (int fd) 
   struct wgnutls_transport_context *ctx;
   gnutls_session session;
   int err;
+
   gnutls_init (&session, GNUTLS_CLIENT);
   gnutls_set_default_priority (session);
+
+  /* We set the server name but only if it's not an IP address. */
+  if (!is_ip_address(hostname))
+    {
+      gnutls_server_name_set (session, GNUTLS_NAME_DNS,
+         hostname, strlen(hostname));
+    }
+
   gnutls_certificate_type_set_priority (session, cert_type_priority);
   gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, credentials);
   gnutls_transport_set_ptr (session, (gnutls_transport_ptr) fd);
--- src/host.c
+++ src/host.c
@@ -904,3 +904,19 @@ host_cleanup (void)
       host_name_addresses_map = NULL;
     }
 }
+
+/* Determine whether or not a hostname is an IP address that we recognise. */
+bool
+is_ip_address (const char *name)
+{
+  const char *endp;
+
+  endp = name + strlen(name);
+  if (is_valid_ipv4_address(name, endp))
+    return true;
+#ifdef ENABLE_IPV6
+  if (is_valid_ipv6_address(name, endp))
+    return true;
+#endif
+  return false;
+}
--- src/host.h
+++ src/host.h
@@ -102,4 +102,6 @@ bool sufmatch (const char **, const char
 
 void host_cleanup (void);
 
+bool is_ip_address(const char *);
+
 #endif /* HOST_H */
--- src/http.c
+++ src/http.c
@@ -1762,7 +1762,7 @@ gethttp (struct url *u, struct http_stat
 
       if (conn->scheme == SCHEME_HTTPS)
         {
-          if (!ssl_connect_wget (sock))
+          if (!ssl_connect_wget (sock, u->host))
             {
               fd_close (sock);
               return CONSSLERR;
--- src/openssl.c
+++ src/openssl.c
@@ -47,6 +47,7 @@ as that of the covered work.  */
 #include "connect.h"
 #include "url.h"
 #include "ssl.h"
+#include "host.h"
 
 /* Application-wide SSL context.  This is common to all SSL
    connections.  */
@@ -390,7 +391,7 @@ static struct transport_implementation o
    Returns true on success, false on failure.  */

 bool
-ssl_connect_wget (int fd)
+ssl_connect_wget (int fd, const char *hostname)
 {
   SSL *conn;
   struct openssl_transport_context *ctx;
@@ -401,6 +402,19 @@ ssl_connect (int fd)
   conn = SSL_new (ssl_ctx);
   if (!conn)
     goto error;
+
+#if OPENSSL_VERSION_NUMBER >= 0x0090806fL && !defined(OPENSSL_NO_TLSEXT)
+  /* If the SSL library was build with support for ServerNameIndication
+     then use it whenever we have a hostname.  If not, don't, ever. */
+  if (!is_ip_address(hostname))
+    {
+      if (!SSL_set_tlsext_host_name(conn, hostname)) {
+       DEBUGP (("Failed to set TLS server-name indication."));
+       goto error;
+      }
+    }
+#endif
+
   if (!SSL_set_fd (conn, fd))
     goto error;
   SSL_set_connect_state (conn);
--- src/ssl.h
+++ src/ssl.h
@@ -33,7 +33,7 @@ as that of the covered work.  */
 #define GEN_SSLFUNC_H
 
 bool ssl_init (void);
-bool ssl_connect_wget (int);
+bool ssl_connect_wget (int, const char *);
 bool ssl_check_certificate (int, const char *);
 
 #endif /* GEN_SSLFUNC_H */