Fix txn init (ITS#7961,#7987)
Fix MDB_PREV_DUP (ITS#7955,#7671)
Fix compact of empty env (ITS#7956)
+ Fix mdb_rebalance collapsing root (ITS#8062)
+ Fix mdb_load with large values (ITS#8066)
+ Fix to retry writes on EINTR (ITS#8106)
+ Fix mdb_cursor_del on empty DB (ITS#8109)
+ Fix MDB_INTEGERDUP key compare (ITS#8117)
+ Added workaround for fdatasync bug in ext3fs
Build
Don't use -fPIC for static lib
Update .gitignore (ITS#7952,#7953)