`dhcp_entry_display` broken

[chuhn]

dhcp_entry_display is implemented in dhcp_entry.inc.php but inoperable and not included in the dcm_module_list table.

It calls a function ona_get_dhcp_entry_record that is not defined anywhere.

[mattpascoe]

@chuhn I've not exhaustively tested this but it seems to do the trick. Check out the develop branch and see if it works out for you, if so I'll get it merged into master.

[chuhn]

@mattpascoe Sorry for the late response.

The patch works well for us.