[Issue 23793] std.stdio.openNetwork should be refactored and moved to a different place

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23793

--- Comment #3 from Witold Baryluk <witold.baryluk+d at gmail.com> ---
Even more comical. `gethostbyname` is deprecated function, even removed from
POSIX.1-2008. And it is multi thread unsafe!

In my opinion one D should use own resolver (like Go) on Unix by default, and
not use C for this, but that is longer project.

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