[RELEASE] Released version 1.5.3

Released version 1.5.3 with the following main changes :
    - DOC: fix typo in Unix Socket commands
    - BUG/MEDIUM: connection: fix memory corruption when building a proxy v2 header
    - BUG/MEDIUM: ssl: Fix a memory leak in DHE key exchange
    - DOC: mention that Squid correctly responds 400 to PPv2 header
    - BUG/MINOR: http: base32+src should use the big endian version of base32
    - BUG/MEDIUM: connection: fix proxy v2 header again!
diff --git a/VERDATE b/VERDATE
index b82e7ce..732ed21 100644
--- a/VERDATE
+++ b/VERDATE
@@ -1,2 +1,2 @@
 $Format:%ci$
-2014/07/12
+2014/07/25