Add new InternetAddress class with a static lookup function (including IPv6

runtime/bin/secure_socket.cc

Index: runtime/bin/secure_socket.cc
diff --git a/runtime/bin/secure_socket.cc b/runtime/bin/secure_socket.cc
index e66ff357c576bf11ed7db7c7b5af44a679770a82..7a5b6f3ad5f21d57b79cb1c63be1b0ed145d37f8 100644
--- a/runtime/bin/secure_socket.cc
+++ b/runtime/bin/secure_socket.cc
@@ -560,19 +560,17 @@ void SSLFilter::Connect(const char* host_name,
 
   // SetPeerAddress
   PRNetAddr host_address;
-  char host_entry_buffer[PR_NETDB_BUF_SIZE];
-  PRHostEnt host_entry;
-  PRStatus rv = PR_GetHostByName(host_name, host_entry_buffer,
-                                 PR_NETDB_BUF_SIZE, &host_entry);
-  if (rv != PR_SUCCESS) {
-    ThrowPRException("Failed PR_GetHostByName call");
+  PRAddrInfo* info = PR_GetAddrInfoByName(host_name,
+                                          PR_AF_UNSPEC,
+                                          PR_AI_ADDRCONFIG);
+  if (info == NULL) {
+    ThrowPRException("Failed PR_GetAddrInfoByName call");
   }
 
-  int index = PR_EnumerateHostEnt(0, &host_entry, port, &host_address);
-  if (index == -1 || index == 0) {
-    ThrowPRException("Failed PR_EnumerateHostEnt call");
-  }
+  PR_EnumerateAddrInfo(0, info, port, &host_address);
+
   memio_SetPeerName(filter_, &host_address);
+  PR_FreeAddrInfo(info);
 }