commit 5f32083c759b468f5b0cb9302e4fe2848d37cc5b
Author: Steve Dickson <steved@redhat.com>
Date:   Tue Apr 10 10:25:40 2018 -0400

    mount.nfs: Fix auto protocol negotiation
    
    Commit 71b807e1 introduce a regression that
    caused v3 not to be tried when v4 was not
    supported by the server during auto negation.
    
    A check of the type in nfs_nfs_version() was
    reverted back to only check for the "nfs4"
    string not the "nfs" string which fixed the
    problem.
    
    Signed-off-by: Steve Dickson <steved@redhat.com>

diff --git a/utils/mount/network.c b/utils/mount/network.c
index 9a2c878..e490399 100644
--- a/utils/mount/network.c
+++ b/utils/mount/network.c
@@ -1279,8 +1279,8 @@ nfs_nfs_version(char *type, struct mount_options *options, struct nfs_version *v
 		}
 	}
 
-	if (!found && strncmp(type, "nfs", 3) == 0)
-		version_val = "4";
+	if (!found && strcmp(type, "nfs4") == 0)
+		version_val = type + 3;
 	else if (!found)
 		return 1;
 	else if (i <= 2 ) {