master,probe: Allow clients to list goal definitions

Change-Id: I5fef8777f882cc670dd2997c8659d0e1547bba51
cgi: Add definition of goals in the CGI interface

This commit renames the "Exports" tab to "Config" and puts in this tab
tables presenting contents of both mfsexports.cfg and mfsgoals.cfg
files.

Change-Id: Ib146ed806396e674d6b92ea7f52f91d35372c3a4