Leave the 'Exit Policies' tab enabled for bridge relays, but disable all the checkboxes
Migrated from old trac:
"[Copied from arma's email]
Right now the 'Exit Policies' tab is greyed out for bridge relays. Can we leave the tab working, but unclick all the exit policy options and grey them out? That will make it clearer to users that their exit policy will be 'no'."