Revert "addrinfo structs must be zeroed on OS X"
Revert "addrinfo structs must be zeroed on OS X"

This wasn't the cause of the segfault described in #90. All fields are
already initialized to valid values.

This reverts commit e367a1da4dc55f17693e33a10fc7720bd8b0f4d6.

Mikehunan/network,jspahrsummers/network,Mikehunan/network,iquiw/network,iquiw/network