5704 libzfs can only handle 255 filedescriptors

@@ -99,10 +99,11 @@
 dir path=opt/zfs-tests/tests/functional/inheritance
 dir path=opt/zfs-tests/tests/functional/interop
 dir path=opt/zfs-tests/tests/functional/inuse
 dir path=opt/zfs-tests/tests/functional/large_files
 dir path=opt/zfs-tests/tests/functional/largest_pool
+dir path=opt/zfs-tests/tests/functional/libzfs
 dir path=opt/zfs-tests/tests/functional/link_count
 dir path=opt/zfs-tests/tests/functional/mdb
 dir path=opt/zfs-tests/tests/functional/migration
 dir path=opt/zfs-tests/tests/functional/mmap
 dir path=opt/zfs-tests/tests/functional/mount

@@ -1773,10 +1774,11 @@
 file path=opt/zfs-tests/tests/functional/large_files/setup mode=0555
 file path=opt/zfs-tests/tests/functional/largest_pool/largest_pool.cfg \
     mode=0555
 file path=opt/zfs-tests/tests/functional/largest_pool/largest_pool_001_pos \
     mode=0555
+file path=opt/zfs-tests/tests/functional/libzfs/many_fds mode=0555
 file path=opt/zfs-tests/tests/functional/link_count/cleanup mode=0555
 file path=opt/zfs-tests/tests/functional/link_count/link_count_001 mode=0555
 file path=opt/zfs-tests/tests/functional/link_count/setup mode=0555
 file path=opt/zfs-tests/tests/functional/mdb/cleanup mode=0555
 file path=opt/zfs-tests/tests/functional/mdb/mdb_001_pos mode=0555