hg: jdk/sandbox: 8233222: Clarify system property usage in KerberosPrincipal instantiation

[chris.hegarty at oracle.com]

Changeset: 31882abe1494
Author:    weijun
Date:      2019-12-07 09:40 +0800
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/31882abe1494

8233222: Clarify system property usage in KerberosPrincipal instantiation
Reviewed-by: mullan

! src/java.security.jgss/share/classes/javax/security/auth/kerberos/KerberosPrincipal.java