is part of Ignatio's change).
Change to define xdr_hyper when it's available locally. (The standard
#include file rpc/xdr.h is not included and the definition needs to be
in remote/xdr_proto.h for some reason).
Since we already have the define ISC_STATUS_LENGTH for the the length of
the status vector, we should use it! Replaced 'status[20]' with
'status[ISC_STATUS_LENGTH]'.
Replaced the different symbolic names for the maximum length of a path
(MAX_PATH, MAX_PATH_LENGTH, MAXPATHLEN) with one uniq symbol MAXPATHLEN.