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Subject: udp_preference_limit fails with SRV records
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Commit 9c6be00daca0b80aed94ec9680724f95e6be92e1 (for ticket 7929, 
introduced in release 1.13) broke udp_preference_limit when SRV or URI 
records are used to discover the KDC location.  
sendto_kdc.c:resolve_server() considers the transport strategy for 
TCP_OR_UDP entries (typically resulting from krb5.conf configuration), 
but not for entries with a specified TCP or UDP transport type.

Reported by Jochen Hein at
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856307