[krbdev.mit.edu #2040] implement draft-ietf-krb-wg-gssapi-cfx (AES etc for GSSAPI)

[Jeffrey Altman via RT]

src/lib/gssapi/krb5/k5sealv3.c refers to SIZE_MAX.

at least on Windows, this preprocessor define or constant variable is
not defined.  what is its value?  and where should it be declared?

Jeffrey Altman