get_all_tuples: second arg is an index to iterate over
Fix bug introduced in 0dacbb84

It's an error to try rewind conn the way 0dacbb84 did: lua proc may block in core
and conn->out_messages will be populated by concurent op's running on same connection.
Such rewind will effectively drop any output they produced.
Disallow updates on replica via lua code
Propagate err_code via lua error
Add test of err_code propagation & forbiden updates via lua
Fix replica startup with both local & remote replication enabled
Fix leak & busyloop
test of 64bit index access from lua
box testing
Update test
Code cleanup: tree_node is useless
Drop memcached support
Use builtin LUAJIT obj dumper