krb5_cc_set_config -  Store a configuration value in a credential cache. 
=========================================================================

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.. c:function:: krb5_error_code krb5_cc_set_config(krb5_context context, krb5_ccache id, krb5_const_principal principal, const char * key, krb5_data * data)

..


:param:

	          **[in]** **context** - Library context

	          **[in]** **id** - Credential cache handle

	          **[in]** **principal** - Configuration for a specific principal; if NULL, global for the whole cache

	          **[in]** **key** - Name of config variable

	          **[in]** **data** - Data to store, or NULL to remove


..


:retval:
         -   0   Success


:return:
         -  Kerberos error codes 

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.. warning::

	 Before version 1.10 *data* was assumed to be always non-null.
 

.. note::

	 Existing configuration under the same key is over-written.