Me, I'm fixing it like this for now...

--- httrack-3.43.2.orig/src/htsback.c
+++ httrack-3.43.2/src/htsback.c
@@ -2357,6 +2357,7 @@

           // vérification de sécurité
           if (back[i].r.soc!=INVALID_SOCKET) {  // hey, you never know..
+          if (!(back[i].r.ssl && (back[i].status>0) &&
(back[i].status<1000))) {
             do_wait=1;

             // noter socket read
@@ -2376,6 +2377,7 @@
               // ID socket la plus élevée
               nfds=back[i].r.soc;
             }
+          }
           } else {
             back[i].r.statuscode=STATUSCODE_CONNERROR;
             if (back[i].status==STATUS_CONNECTING)