Looks like this code was intended to separate Sun's vfs struct from everyone else's, yet the #elif can make it fail on some systems that actually support the capability. So just make it an #else to cover the range of systems we now support and move on.

cmr=v1.7.4:reviewer=jsquyres:subject=correct opal_path_df logic
Update the orterun help messages and man page to reflect new map/rank/bind options and defaults. Thanks to Paul Hargrove for reporting it.

cmr=v1.7.4:reviewer=jsquyres