* sendto_kdc.c (struct conn_state): Add new function pointer field 'service'

* sendto_kdc.c (struct conn_state): Add new function pointer field 'service'
for the fd service routine.
(setup_connection): Initialize it.
(service_fd): Deleted.
(service_fds): Incorporate debug output from service_fd.  Call service routine
indicated in connection info.  Decrement select fd count for each flag set for
a file descriptor.  Ensure that the index into the conns array doesn't run off
the end.
(krb5int_debug_fprint): Fetch correct type for %E.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@14862 dc483132-0cff-0310-8789-dd5450dbe970