- thanks caign and beholder

#152016 (followup) : prevent infinite recursion when using the new 'full node' : 'teaser' formatters.

 since the upgrade - thanks Karen

resulting in repeated "SELECT v.* FROM view_view v WHERE v.name = '--' " queries.
thanks to moggy for noticing this _and_ pinning this down to noderef field

 alex_b and ray007

 (Views) node selection

 'nid'

 the nid / uid

 by ray007

#112464 - refactor userref and noderef validation steps (plus fix / simplify _userreference_potential_references)

 - patch by quicksketch

#112464 standardize validation in field rather than widget, standardize use of $items rather than $node_field

 in content.module)

- updated .pot file

unifying how single and multiple field stores empty field (store 0) - hopefully the last fix for this noderef series, sorry for the back and forth dance

#87030 add blank option when not required to nodereferece, #89717 add views filter options to nodereference

of forms. Those using views.module may have to re-save views after this change.
Custom node templates will need to be renamed.

- the field is multiple valued
- no fields are filled in