Add a workaround for servers which respond RPC_PROGNOTREGISTERED

Add a workaround for servers which respond RPC_PROGNOTREGISTERED
to a clnt_create() call even when it is actually a program
version mismatch.

Normally the server is supposed to return RPC_PROGVERSMISMATCH
when it supports the specified program but not support
the specified version.  Some filers return RPC_PROGNOTREGISTERED
to RQUOTA v2 calls and FreeBSD does not retry with the old
v1 calls.  This change fixes this failure scenario.

Submitted by:	Jian-Bo Liao
PR:		236179