crypto/x509: add comment to blank imports done for init side effects

To educate future readers.

Change-Id: I1ef79178b6997cc96ca066c91b9fec822478674b
Reviewed-on: https://go-review.googlesource.com/c/go/+/266301
Reviewed-by: Katie Hockman <katie@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Run-TryBot: Katie Hockman <katie@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>

diff --git a/src/crypto/x509/x509.go b/src/crypto/x509/x509.go
index a314b5ed1ad4142cb58a70c6bff91656daada57a..537c207f38fd5847e1e930ee330228bc3c7fab1d 100644 (file)
--- a/src/crypto/x509/x509.go
+++ b/src/crypto/x509/x509.go
@@ -28,6 +28,8 @@ import (
        "time"
        "unicode"
 
+       // Explicitly import these for their crypto.RegisterHash init side-effects.
+       // Keep these as blank imports, even if they're imported above.
        _ "crypto/sha1"
        _ "crypto/sha256"
        _ "crypto/sha512"