Renamed functions

In two cases it was necessary to rename functions which are used in Berkeley Sockets in order to avoid clashes with other Win32 API functions.

close & closesocket

Sockets are represented by standard file descriptors in Berkeley Sockets, so the close function can be used to close sockets as well as regular files. While nothing in the Windows Sockets prevents an implementation from using regular file handles to identify sockets, nothing requires it either. Sockets must be closed by using the closesocket routine. Using the close routine to close a socket is incorrect and the effects of doing so are undefined by this specification.

ioctl & ioctlsocket/WSAIoctl

Various C language run-time systems use the ioctl routine for purposes unrelated to Windows Sockets. As a consequence, the ioctlsocket function and the WSAIoctl function were defined to handle socket functions that were performed by ioctl and fcntl in the Berkeley Software Distribution.

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