bees
                                
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                        Call munlock() on out of data and mlock() on crawl start
I have some servers with always running bees, and servers have some time when write not happens. So, call munlock() on crawl out of data, allow bees to free memory for other system, while bees are idle. As mlock() have some performance benefits and we just don't want disable it, so just do mlock() again on crawl start.
#36