Rename probes & attached functions
Improve udp tracking (close)

On close, if the socket was binded, the source port cannot be 0
Improve udp tracking (connect)

'Connect' can also be called on udp sockets
Improve udp tracking (bind)

Use both a pre-hook and a post-hook on the bind in order to
get the local port binded (As for connect, for a given pid,
nothing can happen between the pre and the post hooks)
Always use MODULE_NAME for printk
Set UDP probing on by default
Do not filter udp on dgram
Use mm->exe_file on older versions of linux

I have no idea on which version is was included, however it does
not work on the 2.6.19 used by sl5 but work on the 2.6.32 used by
sl6. Exact version to be modified later.