I have been having some problems with ypserv occasionally deciding to
listen on tcp port 783, which breaks spamd.  As far as I can tell from
the source files of ypserv and svc_tcp.c, the subr svctcp_create
simply returns an arbitrary unused port.

Since services started from /usr/local/etc/rc.d, such as spamd, start
after ypserv, it may take a port needed by one of these services.

Does anybody have any recommendations on how to fix or work around
this problem?  Some solutions that do come to mind are:

1. Sticking some code in spamd.sh to run `rpcinfo -p' and if any rpc
   services are using 783/tcp, kill them off before starting spamd and
   then restart them.

2. By pass the usual startup of ypservices in the FreeBSD boot
   sequence and stick my own scripts in /usr/local/etc/rc.d, thus
   ensuring that they start after any local services.

However, both of these strike me as an awful kludge.

By the way, unlike some implementations of ypserv, I don't think that
FreeBSD's consults /etc/services to either determine which port it
should use or which ports it should avoid.

Thanks in advance for any suggestions.  ...Sandy

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