[perl #34120] [PATCH] win32 bind, listen, accept

[Markus Amslser]

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This patch extends the io NET_DEVEL with the 'server' functions bind,
listen and accept. I only tested it on win32, so no idea what happens on
unix. I'm not sure wether i did it right with the ops numbering, but it
worked for me (See the next patch).

Markus

Changelog:
- implement bind, listen, accept on win32
- some casting cleanup