gssapiP_krb5.h: Changed most krb5 gssapi functions to take a void * as

gssapiP_krb5.h: Changed most krb5 gssapi functions to take a void * as
	their first argument, instead of a krb5_context.  Makes for a cleaner
	interface to the mechanism glue layer.

k5mech.c (krb5_gss_initialize): Call name-type/mechanism registration
	function so that mechanism glue layer knows whether or not a name
	needs to be lazy evaluated or not.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@7514 dc483132-0cff-0310-8789-dd5450dbe970