Fix leaks in get_init_creds interface
In Debian Bug 598032, Bastian Blank points out that there are two
leaks in the get_init_creds interface:
* Free ctx->request->padata after sending the KDC request so it is not
overwritten the next time around the loop.
* If options is NULL passed into krb5_get_init_creds_init, then set up
a non-extended options structure so that krb5_get_init_creds_free will
free the options.
ticket: 6801
target_version: 1.9
git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@24452
dc483132-0cff-0310-8789-
dd5450dbe970