Accept all waiting connections during event loop iteration
Accept all waiting connections during event loop iteration

Speed up acceptor with enabled io_collect_interval.

rtsisyk/tarantool,ocelot-inc/tarantool,mejedi/tarantool,rtsisyk/tarantool,mejedi/tarantool,mejedi/tarantool,ocelot-inc/tarantool,ocelot-inc/tarantool,rtsisyk/tarantool,rtsisyk/tarantool,mejedi/tarantool,ocelot-inc/tarantool