Update of Yandex' SMBable em driver

[Sergey Matveychuk]

Ivan Voras пишет:
> Vladimir Ivanov wrote:
>> Hi,
>>
>> We've published latest versions at
>>
>> http://people.yandex-team.ru/~wawa/em-6.7.3-yandex-1.40.tar.gz
>> http://people.yandex-team.ru/~wawa/em-6.9.6-RELENG7-yandex-1.36.2.8.tar.gz
>>
>> These revisions use mtx_trylock instead of mtx_lock in em_start().
> 
> Thank you!
> 
> Why the two versions? Is the first one for -CURRENT?
> 
> (It looks like it would be interesting to try it on CURRENT with some
> ongoing SMP TCP work)
> 

Nope. The first one for RELENG_6.

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