hg: jdk/sandbox: 8215711: Missing key_share extension for (EC)DHE key exchange should alert missing_extension

[chris.hegarty at oracle.com]

Changeset: f229508da5ed
Author:    xuelei
Date:      2020-04-05 20:17 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/f229508da5ed

8215711: Missing key_share extension for (EC)DHE key exchange should alert missing_extension
Reviewed-by: ascarpino

! src/java.base/share/classes/sun/security/ssl/KeyShareExtension.java
! src/java.base/share/classes/sun/security/ssl/PreSharedKeyExtension.java
! src/java.base/share/classes/sun/security/ssl/SSLExtension.java
! src/java.base/share/classes/sun/security/ssl/SupportedGroupsExtension.java