Request for approval to 7u4 for CR 7077646, 7077646 and 7089889

[Weijun Wang]

Hi All

This is a request to backport 3 jdk8 fixes into jdk7u4

   gssapi wrap for CFX per-message tokens always set FLAG_ACCEPTOR_SUBKEY
   http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7077646

   gss wrap for cfx doesn't handle rrc != 0
   http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7077640

   Krb5LoginModule.login() throws an exception if used without a keytab
   http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7089889

All three bugs on the implementation of the JGSS-API Kerberos mechanism. 
All reported by external customers.

The fixes are already included in jdk8 as:

   7077640, reviewed by valeriep
   http://hg.openjdk.java.net/jdk8/tl/jdk/rev/9b951304bd0a

   7077646, reviewed by valeriep
   http://hg.openjdk.java.net/jdk8/tl/jdk/rev/8d88e694441c

   7089889, reviewed by xuelei and valeriep
   http://hg.openjdk.java.net/jdk8/tl/jdk/rev/79582fcc8329

The code changes for jdk7u4 are identical to the ones in jdk8.

I intend to push it to

    ssh://hg.openjdk.java.net/jdk7u/jdk7u-dev-gate/jdk

Thanks
Weijun