Merge 'prefetch_bug-unqualified_column_in_search_related_cond' into 'trunk'

Merge 'prefetch_bug-unqualified_column_in_search_related_cond' into 'trunk'

r7773@Thesaurus (orig r7761):  norbi | 2009-10-05 14:49:06 +0200
Created branch 'prefetch_bug-unqualified_column_in_search_related_cond': A bug that manifests when a prefetched table's column is referenced without the table name in the condition of a search_related() on an M:N relationship.
r7878@Thesaurus (orig r7866):  ribasushi | 2009-11-12 02:36:08 +0100
Factor some code out
r7879@Thesaurus (orig r7867):  ribasushi | 2009-11-12 09:11:03 +0100
Factor out more stuff
r7880@Thesaurus (orig r7868):  ribasushi | 2009-11-12 09:21:04 +0100
Saner naming/comments
r7910@Thesaurus (orig r7898):  ribasushi | 2009-11-15 12:39:29 +0100
Move more code to DBIHacks, put back the update/delete rs check, just in case
r7911@Thesaurus (orig r7899):  ribasushi | 2009-11-15 13:01:34 +0100
TODOify test until we get an AST
r7912@Thesaurus (orig r7900):  ribasushi | 2009-11-15 13:10:15 +0100
Hide from pause