Merge 'rs_UD_cleanup' into 'trunk'

r9365@Thesaurus (orig r9351):  ribasushi | 2010-05-12 10:09:54 +0200
New branch to cleanup resultset-wide update/delete
r9419@Thesaurus (orig r9405):  wreis | 2010-05-19 02:49:47 +0200
failing tests for RS->update
r9511@Thesaurus (orig r9497):  rabbit | 2010-06-01 00:20:39 +0200
Fix update/delete on prefetching resultsets
r9512@Thesaurus (orig r9498):  rabbit | 2010-06-01 00:24:54 +0200
Test cleanup
r9513@Thesaurus (orig r9499):  rabbit | 2010-06-01 00:25:14 +0200
test replication test fail