Fix main.c build (#129)

Fix the build process on ARMs (#125)

This patch was provided by Andreas Beckmann <anbe@debian.org>
to Debian project. See details at https://bugs.debian.org/1100959

Description: the virt_addr_valid macro wants a void* argument

Release V1.9.1

Memory imaging is no longer very very very slow in certain cases.
Supports new TCP options in kernel 4.8
Other fixes

Merge branch 'valldrac-deflate'

Adds the option to compress memory images at the kernel.
This saves space on disk and an transfer over TCP

Fixes for digest transfers

This release fixes issues for transferring a calculated digest over a
tcp socket. The module will now retry 10x when it fails to bind a socket.

The Makefile also provides an option to build a module without stripping
symbols

Merge pull request #46 from kost/kdir-support

KDIR support (headers outside standard location)

documentation of the timeout parameter (Fixes #27)

* documentation of the timeout parameter

* Update README

Disable timing on kernels before 2.6.34, since ktime_to_ms wasn't ava…

…ilable before then. Fixes #25

Disabled timeout for kernel versions < 2.6.16.

#21: Tweak default timeout again.