add AI_ADDRCONFIG to ai_flags in connect.cc as suggested by Aurelien Jarno

in his response to Bernhard R. Link's patch, thanks! (Closes: #505020)

debian/changelog

@@ -42,6 +42,8 @@ apt (0.7.25) UNRELEASED; urgency=low
     - add --debian-only as alias for --diff-only
   * methods/connect.cc:
     - display also strerror of "wicked" getaddrinfo errors
+    - add AI_ADDRCONFIG to ai_flags as suggested by Aurelien Jarno
+      in response to Bernhard R. Link, thanks! (Closes: #505020)
   * buildlib/configure.mak, buildlib/config.{sub,guess}:
     - remove (outdated) config.{sub,guess} and use the ones provided
       by the new added build-dependency autotools-dev instead

methods/connect.cc

@@ -158,6 +158,7 @@ bool Connect(string Host,int Port,const char *Service,int DefPort,int &Fd,
       struct addrinfo Hints;
       memset(&Hints,0,sizeof(Hints));
       Hints.ai_socktype = SOCK_STREAM;
+      Hints.ai_flags = AI_ADDRCONFIG;
       Hints.ai_protocol = 0;
       
       // if we couldn't resolve the host before, we don't try now