Improve gnutls-min-prime-bits docstring

* lisp/net/gnutls.el (gnutls-min-prime-bits): Doc fix: delete
out-of-date and now misleading sentence, added back when Emacs'
default minimum prime bits for a Diffie-Hellman handshake was only 256
bits.  These days, the default is nil, which means to let GnuTLS
decide the value.  (See also `nsm-protocol-check--dhe-prime-kx`.)

diff --git a/lisp/net/gnutls.el b/lisp/net/gnutls.el
index 6e3845aec1aa6fa184fe28685b537bf92f9c1dd9..9f14df08a79df9214d87a2d61bd8a9bf75397c74 100644 (file)
--- a/lisp/net/gnutls.el
+++ b/lisp/net/gnutls.el
@@ -128,10 +128,7 @@ key exchange is against man-in-the-middle attacks.)
 
 A value of nil says to use the default GnuTLS value.
 
-The default value of this variable is such that virtually any
-connection can be established, whether this connection can be
-considered cryptographically \"safe\" or not.  However, Emacs
-network security is handled at a higher level via
+Emacs network security is handled at a higher level via
 `open-network-stream' and the Network Security Manager.  See Info
 node `(emacs) Network Security'."
   :type '(choice (const :tag "Use default value" nil)