commit cb493f02ca3b8fbf0dba18d5a733345f54513300
Author: zoulasc <christos@zoulas.com>
Date:   Mon Mar 7 18:03:19 2016 -0500

    1. Add the "sys" alias for "unix", as well as "none", and "null"
    2. Properly handle multiple flavors, although the linux kernel does not (yet?)
    3. Don't add the "sec=" field, because it is already there.

diff --git a/libamu/mount_fs.c b/libamu/mount_fs.c
index 87f64c3..366eb8b 100644
--- a/libamu/mount_fs.c
+++ b/libamu/mount_fs.c
@@ -1076,7 +1076,10 @@ struct {
   const char *name;
   int num;
 } flavours[] = {
+  { "none",     AUTH_NONE },
+  { "null",     AUTH_NULL },
   { "unix",	AUTH_UNIX },
+  { "sys",      AUTH_SYS },
   { "krb5",	RPC_AUTH_GSS_KRB5 },
   { "krb5i",	RPC_AUTH_GSS_KRB5I },
   { "krb5p",	RPC_AUTH_GSS_KRB5P },
@@ -1104,12 +1107,13 @@ set_nfs4_security(nfs4_args_t *nap, mntent_t *mntp)
   nap->auth_flavours = xmalloc(l * sizeof(*nap->auth_flavours));
 
   s = ss = xstrdup(o);
+  l = 0;
   for (;;) {
     q = strchr(s, ',');
     if (q)
 	*q = '\0';
 
-    for (l = 0, i = 0; i < sizeof(flavours) / sizeof(flavours[0]); i++)
+    for (i = 0; i < sizeof(flavours) / sizeof(flavours[0]); i++)
       if (strcmp(flavours[i].name, s) == 0) {
 	nap->auth_flavours[l++] = flavours[i].num;
 	break;
@@ -1125,6 +1129,9 @@ set_nfs4_security(nfs4_args_t *nap, mntent_t *mntp)
     s = ++q;
   }
 
+  if (l == 0) {
+    nap->auth_flavours[l++] = AUTH_UNIX;
+  }
   nap->auth_flavourlen = l;
   return ss;
 }
@@ -1172,12 +1179,15 @@ add_nfs4_mntopts(const nfs4_args_t *nap, mntent_t *mntp, char *sec)
   opts = xrealloc(mntp->mnt_opts, len);
   xstrlcat(opts, buf, len);
 
+#ifdef notdef
+  /* Already in the options */
   if (sec) {
     xstrlcat(opts, ",", len);
     xstrlcat(opts, MNTTAB_OPT_SEC, len);
     xstrlcat(opts, "=", len);
     xstrlcat(opts, sec, len);
   }
+#endif
 
   mntp->mnt_opts = opts;
 }