Report if IPv6 support is enabled with the -v flag

The IPv6 support is stored in the config.h header file, instead of being
passed with the -D flag, so it is easier to read from version.cc.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/version.cc b/src/version.cc
index 18eb5019..e1eb30c3 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -141,6 +141,11 @@ static void print_features()
 #else
          " -TLS"
 #endif
+#ifdef ENABLE_IPV6
+         " +IPV6"
+#else
+         " -IPV6"
+#endif
          "\n");
 }