Support for portal fs was removed so no need for it anymore in current as example
Index: man.1 =================================================================== RCS file: /cvs/src/usr.bin/man/man.1,v retrieving revision 1.47 diff -u -r1.47 man.1 --- man.1 7 Jul 2011 04:24:35 -0000 1.47 +++ man.1 29 Aug 2011 10:10:30 -0000 @@ -131,7 +131,6 @@ mount_nfs (8) \(en mount NFS file systems mount_nnpfs (8) \(en mount the nnpfs filesystem mount_ntfs (8) \(en mount an NTFS file system -mount_portal (8) \(en mount the portal daemon mount_procfs (8) \(en mount the process file system mount_udf (8) \(en mount a UDF filesystem mountd (8) \(en service remote NFS mount requests