- Jad Chamcham pointed out a bug with connection re-use. If a connection had

CURLOPT_HTTPPROXYTUNNEL enabled over a proxy, a subsequent request using the
  same proxy with the tunnel option disabled would still wrongly re-use that
  previous connection and the outcome would only be badness.

RELEASE-NOTES

@@ -23,6 +23,7 @@ This release includes the following bugfixes:
  o configure --with-nss is set but not "yes"
  o don't store LDFLAGS in pkg-config file
  o never-pruned DNS cached entries
+ o HTTP proxy tunnel re-used connection even if tunnel got disabled
 
 This release includes the following known bugs:
 
@@ -33,6 +34,6 @@ advice from friends like these:
 
  Yang Tse, Kamil Dudka, Christian Schmitz, Constantine Sapuntzakis,
  Marco Maggi, Camille Moncelier, Claes Jakobsson, Kevin Baughman,
- Marc Kleine-Budde
+ Marc Kleine-Budde, Jad Chamcham
 
         Thanks! (and sorry if I forgot to mention someone)