autofs-5.1.8 - bailout on rpc systemerror

From: Ian Kent <raven@themaw.net>

If there's a system error (eg. oversize packet received) just give up
since redoing the call would likely end up with the same error.

Signed-off-by: Ian Kent <raven@themaw.net>
---
 CHANGELOG      |    1 +
 lib/rpc_subs.c |    2 ++
 2 files changed, 3 insertions(+)

--- autofs-5.1.7.orig/CHANGELOG
+++ autofs-5.1.7/CHANGELOG
@@ -99,6 +99,7 @@
 - make NFS version check flags consistent.
 - refactor get_nfs_info().
 - also require TCP_REQUESTED when setting NFS port.
+- bailout on rpc systemerror.
 
 25/01/2021 autofs-5.1.7
 - make bind mounts propagation slave by default.
--- autofs-5.1.7.orig/lib/rpc_subs.c
+++ autofs-5.1.7/lib/rpc_subs.c
@@ -1200,6 +1200,8 @@ static int rpc_get_exports_proto(struct
 				 info->timeout);
 		if (status == RPC_SUCCESS)
 			break;
+		if (status == RPC_SYSTEMERROR)
+			break;
 		if (++vers_entry > 2)
 			break;
 		CLNT_CONTROL(client, CLSET_VERS,