If the index file is empty then index is rebuilded
Merge branch 'applypatch' into testmerge
Fix multiple && query, reintroduce envelope merging
try to fix thread concurency with mvstore
Merge branch 'applypatch' into testmerge
Add synchronise on store
Merge branch 'applypatch' into testmerge
Remove synchronise, fix nothing at all
Merge branch 'applypatch' into testmerge
Found how to raise mvstore threading issues
Merge branch 'applypatch' into testmerge
some messages in ut