[8u] RFR Backport 8132130: Some docs cleanup

[Elliott Baron]

Hi,

I'd like to request a review to backport 8132130 to 8u. 8132130 contains 
several documentation fixes that allow 8177334 to apply more cleanly.

Original fix:
https://bugs.openjdk.java.net/browse/JDK-8132130
http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/339e2b4a5241

The JDK 9 changeset did not apply cleanly. Aside from path changes, I 
made the following modifications to backport this fix to 8u:

sun/security/jgss/krb5/Krb5NameElement:
- For equals method, "@param name" already changed to "@param other" by 
"8048030: Expectations should be consistent".

sun/security/krb5/Checksum:
- Updated context for first constructor due to additional Javadoc 
introduced by "8229951: Better Ticket Granting Services".
- Doc changes for other constructors in the original fix are no longer 
applicable due to further changes from 8229951.

sun/security/krb5/Realm:
- getRealmsList "@return" tag already corrected by "8133802: replace 
some <tt> tags (obsolete in html5) in security-libs docs".

sun/security/krb5/internal/EncKDCRepPart:
- Small spacing change due to "8215032: Support Kerberos cross-realm 
referrals (RFC 6806)".


8u webrev:
https://cr.openjdk.java.net/~ebaron/jdk8u/JDK-8132130/webrev.00/

Testing: x86_64 build, jdk_tier1, jdk_security tests

Thanks,
Elliott