* amd/amfs_generic.c (amfs_lookup_mntfs): removed redundant use of

* amd/amfs_generic.c (amfs_lookup_mntfs): removed redundant use of
old_def_opts variable.

* amd/amfs_generic.c (amfs_lookup_mntfs) : Make sure when a map
entry has a single dash '-', that the default options are reset.
This functionality was somehow lost from earlier releases and
reported by Dan Riley <dsr@mail.lns.cornell.edu>.

(AC_CHECK_MNT2_NFS_OPTS): Check for private NFS mount option (IRIX 6).

if missing.