Use up-to-date system call to create epoll context

[lovelle]

epoll_create() is a deprecated, older variant of epoll_create1(). Older versions
of epoll_create() used to take a size argument to provide a hint about the
number of file descriptors to be watched. Nowadays the kernel dynamically sizes
the required data structures.

[lovelle]

Hi @antirez! please feel free to close this pull at your own will

[antirez]

Hello @lovelle, AFAIK the old systemcall will just discard the argument and call the new implementation, so why bother?

[lovelle]

@antirez Yes, that's correct, but is an implementation detail, I think is better not using a consider deprecated syscall, at least from a consistency standpoint.

Also, as a detail: The newer syscall is able to prevent any forked process to access to that file descriptor with EPOLL_CLOEXEC flag.

Thanks!

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