Program can now be started as a Windows Service. No additional
arguments needed. Refer to `service_install` and `service_remove`
scripts in released zip file.
New option `-k` splits HTTP request into two segments, and either
send only the first one (Windows would retransmit the other one
based on ACK number in ACK reply) or both (with `-n` enabled).
This fixes behaviour on some DPI which trace persistent sessions
but do not reassemble packages.
Windows is known to use all available interfaces for DNS requests,
which is handled as a duplicate (retransmission) in dns redirector.
It's safe to just drop these duplicates.
