How about this? Producing a list (:hostname t) is not what you
want,
since that removes the 'check everything' feature of specifying
just
't'.
diff --git a/lisp/net/gnutls.el b/lisp/net/gnutls.el
index 9b13adaefe..14368bc298 100644
--- a/lisp/net/gnutls.el
+++ b/lisp/net/gnutls.el
@@ -345,8 +345,11 @@ gnutls-boot-parameters
(t nil))))
(min-prime-bits (or min-prime-bits
gnutls-min-prime-bits)))
- (when verify-hostname-error
- (push :hostname verify-error))
+ ;; Only add :hostname if `verify-error' is not t, since t
+ ;; means "include :hostname" Bug#38602.
+ (and verify-hostname-error
+ (not (eq verify-error t))
+ (push :hostname verify-error))
`(:priority ,priority-string
:hostname ,hostname