Immanuel/btpd: A clone of btpd with my configuration changes. - btpd

A clone of btpd with my configuration changes.

Richard Nyberg c94ed423cf Fix possible crash with kqueue. With kqueue, a fdev may be in two active kevents.		16 anni fa
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epoll.c	Rename timer* to evtimer*.	16 anni fa
evloop.h	Fix possible crash with kqueue.	16 anni fa
kqueue.c	Fix possible crash with kqueue.	16 anni fa
poll.c	Rename timer* to evtimer*.	16 anni fa
timeheap.c	Add evloop, btpd's new event loop. This will replace libevent.	16 anni fa
timeheap.h	Add evloop, btpd's new event loop. This will replace libevent.	16 anni fa
timer.c	Run timeouts that will expire in less than one millisecond.	16 anni fa