More informative error message enables HTTPS server configuration mistakes to be corrected quickly, since log files will now include the rejected hostname. If the hostname should be accepted, it can be added to the HostWhitelist Policy. Fixes golang/go#28345 Change-Id: I801c82f0d3b19bc34592c9cd0bce77f1b284d19d GitHub-Last-Rev: 5dfe731d732d693f9bdd79c8a74efd30a2f56d0b GitHub-Pull-Request: golang/crypto#63 Reviewed-on: https://go-review.googlesource.com/c/144337 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>