ssl: fix duplicated SSL handshake with multi interface and proxy

Bug: https://bugzilla.redhat.com/788526
Reported by: Enrico Scholz

RELEASE-NOTES

@@ -24,6 +24,7 @@ This release includes the following bugfixes:
  o cmdline: made -D option work with -O and -J
  o configure: Fix libcurl.pc and curl-config generation for static MingW*
    cross builds
+ o ssl: fix duplicated SSL handshake with multi interface and proxy [1]
 
 This release includes the following known bugs:
 
@@ -39,4 +40,4 @@ advice from friends like these:
 
 References to bug reports and discussions on issues:
 
- 
+ [1] = https://bugzilla.redhat.com/788526

lib/sslgen.c

@@ -211,18 +211,18 @@ CURLcode
 Curl_ssl_connect_nonblocking(struct connectdata *conn, int sockindex,
                              bool *done)
 {
-#ifdef curlssl_connect_nonblocking
   CURLcode res;
   /* mark this is being ssl requested from here on. */
   conn->ssl[sockindex].use = TRUE;
+#ifdef curlssl_connect_nonblocking
   res = curlssl_connect_nonblocking(conn, sockindex, done);
+#else
+  *done = TRUE; /* fallback to BLOCKING */
+  res = curlssl_connect(conn, sockindex);
+#endif /* non-blocking connect support */
   if(!res && *done)
     Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSL is connected */
   return res;
-#else
-  *done = TRUE; /* fallback to BLOCKING */
-  return Curl_ssl_connect(conn, sockindex);
-#endif /* non-blocking connect support */
 }
 
 /*