[krbdev.mit.edu #2587] export usable gss context / limit negotiated enctypes

[kwc@citi.umich.edu via RT]

The attached files add mechanism-specific GSS-API routines to export and
free a "usable" gssapi security context, and limit the encryption types
negotiated to create the context.

There is a patch file against CVS head circa 2004.04.20, two new .c files
and a .h file which go into the lib/gssapi/krb5 directory.

Kevin Coffman
University of Michigan -- CITI
kwc at citi.umich.edu