Always log chosen security type

It's often useful to see if encryption was used, and how the user
authenticated (if at all).
diff --git a/common/rfb/CConnection.cxx b/common/rfb/CConnection.cxx
index 1695c3a..e0a23b5 100644
--- a/common/rfb/CConnection.cxx
+++ b/common/rfb/CConnection.cxx
@@ -181,7 +181,7 @@
     if (secType != secTypeInvalid) {
       os->writeU8(secType);
       os->flush();
-      vlog.debug("Choosing security type %s(%d)",secTypeName(secType),secType);
+      vlog.info("Choosing security type %s(%d)",secTypeName(secType),secType);
     }
   }