From: Felix Lechner <felix.lechner@lease-up.com>
Date: Sat, 2 Sep 2017 09:57:43 -0300
Subject: Fix protocol return value when built with TLS

When building from source, the protocol test for smtp ('make check')
fails with an unexpected retval (5 vs. 10) when configured with
--enable-tls. The error may occur only when getaddrinfo() is
available. A stray errno survived past a somewhat convoluted series of
conditionals, and should to be cleared before it.

Forwarded: no
---
 lib/tcpconnect.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/tcpconnect.cc b/lib/tcpconnect.cc
index d4cf9a9..683ff24 100644
--- a/lib/tcpconnect.cc
+++ b/lib/tcpconnect.cc
@@ -95,6 +95,7 @@ int tcpconnect(const char* hostname, int port, const char* source)
       return err;
   }
   int s = -1;
+  errno = 0;
   err = ERR_CONN_FAILED;
   struct addrinfo* orig_res = res;