event/net/BufferedSocket: optimize ScheduleReadTimeout()
event/net/BufferedSocket: optimize ScheduleReadTimeout()

This eliminates an extra recvfrom() system call after receiving the
HTTP request headers.

CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy