krb5_is_referral_realm -  Check for a match with KRB5_REFERRAL_REALM. 
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.. c:function:: krb5_boolean krb5_is_referral_realm(const krb5_data * r)

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:param:

	          **[in]** **r** - Realm to check


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:return:
         -  TRUE if r is zero-length, FALSE otherwise 

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