sendauth.c (krb5_sendauth): Make sure the scratch credentials

sendauth.c (krb5_sendauth): Make sure the scratch credentials
	structure may have possible been used be freed..

rd_safe.c (krb5_rd_safe_basic): Fall through to the cleanup code at
	the end, to make sure the decoded message in message is freed.

rd_req_dec.c (krb5_rd_req_decoded): Use krb5_copy_keyblock to copy
	authent->subkey to auth_context->remote_subkey.  Keeping them
	separate avoids aliasing problems.

mk_req_ext.c (krb5_generate_authenticator): Fix memory leak.  Don't
	bash authent->subkey with key after carefully copying it using
	krb5_copy_keyblock!

recvauth.c (krb5_recvauth): krb5_get_server_rcache() already opens the
	rcache; doing it again merely causes a memory leak.

gen_subkey.c (krb5_generate_subkey): Eliminate memory leak.
	krb5_init_random_key() does its own allocation of the
	keyblock.

gc_via_tkt.c (krb5_kdcrep2creds): Fix memory leak.

srv_rcache.c (krb5_get_server_rcache): Fix memory leak.

rd_safe.c (krb5_rd_safe_basic): Fix memory leak.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@6797 dc483132-0cff-0310-8789-dd5450dbe970