move int tun_device in info.tun_device

Conflicts:

	linkfd.c
move int mypid in info.pid except retransmit_send()

Conflicts:

	linkfd.c
	vtun.h
move chan_amt in info.channel_amount

Conflicts:

	linkfd.c
move channel_ports[] into info.channel[]

Conflicts:

	gdb_auto_attach.py
	linkfd.c
move channels[] into info.channel[].descriptor and fix bug in retransmit send

Conflicts:

	linkfd.c