Replace checkLinkNameForId() with isLinkNameAvailableForId(), and implement
that new function in terms of only the existing doesLinkNameExist() and
doesLinkNameBelongToId().
Patch by: Todd Larsen
Review by: Pawel Solyga
Review via: discussion of patches on melange-soc-dev mailing list
class_prepared = object()
pre_init= object()
post_init = object()
pre_save = object()
post_save = object()
pre_delete = object()
post_delete = object()
post_syncdb = object()