MFC r311947, r311981:

rpcgen(1): Avoid unused variable warning on generated code.

Avoid "unused variable 'i'" warnings in generated .c files by only
emitting the "int i;" for non-opaque arrays. Opaque arrays use
xdr_opaque() rather than iterating over the array.

Obtained from: OpenBSD (CVS rev 1.28)

rpcgen(1): Check getrlimit() return for generated code.

Obtained from: NetBSD (CVS rev 1.27, 1.28)