Use VncAuth as the default security type, since TLS causes a significant performance hit on some systems

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4304 3789f03b-4d11-0410-bbf8-ca57d06f2519

common/rfb/SecurityServer.cxx

@@ -39,7 +39,7 @@ StringParameter SecurityServer::secTypes
 ("SecurityTypes",
  "Specify which security scheme to use (None, VncAuth)",
 #ifdef HAVE_GNUTLS
- "TLSVnc,VncAuth",
+ "VncAuth,TLSVnc",
 #else
  "VncAuth",
 #endif