Don't enable RSA-AES by default in servers

These require a key to have been set up on the server beforehand, so
they do not give a good default experience as clients will be unable to
connect.

common/rfb/SecurityServer.cxx

@@ -50,9 +50,6 @@ StringParameter SecurityServer::secTypes
  ")",
 #ifdef HAVE_GNUTLS
  "TLSVnc,"
-#endif
-#ifdef HAVE_NETTLE
- "RA2_256,RA2,RA2ne_256,RA2ne,"
 #endif
  "VncAuth",
 ConfServer);

unix/x0vncserver/x0vncserver.man

@@ -106,7 +106,7 @@ Specify which security scheme to use for incoming connections.  Valid values
 are a comma separated list of \fBNone\fP, \fBVncAuth\fP, \fBPlain\fP,
 \fBTLSNone\fP, \fBTLSVnc\fP, \fBTLSPlain\fP, \fBX509None\fP, \fBX509Vnc\fP,
 \fBX509Plain\fP, \fBRA2\fP, \fBRA2ne\fP, \fBRA2_256\fP and \fBRA2ne_256\fP.
-Default is \fBTLSVnc,RA2_256,RA2,RA2ne_256,RA2ne,VncAuth\fP.
+Default is \fBTLSVnc,VncAuth\fP.
 .
 .TP
 .B \-rfbauth \fIpasswd-file\fP, \-PasswordFile \fIpasswd-file\fP

unix/xserver/hw/vnc/Xvnc.man

@@ -188,7 +188,7 @@ Specify which security scheme to use for incoming connections.  Valid values
 are a comma separated list of \fBNone\fP, \fBVncAuth\fP, \fBPlain\fP,
 \fBTLSNone\fP, \fBTLSVnc\fP, \fBTLSPlain\fP, \fBX509None\fP, \fBX509Vnc\fP,
 \fBX509Plain\fP, \fBRA2\fP, \fBRA2ne\fP, \fBRA2_256\fP and \fBRA2ne_256\fP.
-Default is \fBTLSVnc,RA2_256,RA2,RA2ne_256,RA2ne,VncAuth\fP.
+Default is \fBTLSVnc,VncAuth\fP.
 .
 .TP
 .B \-Password \fIpassword\fP