Removal of following export controll related sentences:

o Because of export controls, TELNET ENCRYPT option is not supported outside
  of the United States and Canada.
o Because of export controls, data encryption
  is not supported outside of the United States and Canada.

src/crypto/README revision 1.5 commit log says:
> Crypto sources are no longer export controlled:
> Explain, why crypto sources are still in crypto/.
and actually telnet encryption is used outside of US and Canada now.

Pointed out by: OHSAWA Chitoshi <ohsawa@catv1.ccn-net.ne.jp>
Reviewed by: no objection on doc


git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@81665 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f

telnet/telnet.1

@@ -376,10 +376,6 @@ The encrypt command manipulates the information sent through the
 .Dv TELNET ENCRYPT
 option.
 .Pp
-Note:  Because of export controls, the
-.Dv TELNET ENCRYPT
-option is not supported outside of the United States and Canada.
-.Pp
 Valid arguments for the
 .Ic encrypt
 command are:
@@ -1171,10 +1167,6 @@ stream does not start automatically.  The autoencrypt
 (autodecrypt) command states that encryption of the
 output (input) stream should be enabled as soon as
 possible.
-.Pp
-Note:  Because of export controls, the
-.Dv TELNET ENCRYPT
-option is not supported outside the United States and Canada.
 .It Ic autologin
 If the remote side supports the
 .Dv TELNET AUTHENTICATION
@@ -1363,8 +1355,6 @@ toggle is
 prints out a message each time encryption is enabled or
 disabled.  The initial value for this toggle is
 .Dv FALSE .
-Note:  Because of export controls, data encryption
-is not supported outside of the United States and Canada.
 .It Ic ?\&
 Displays the legal
 .Ic toggle