Also make the docs

DRBD 8.4.2 on Ubuntu 12.04

# drbd8-utils does not match the drbd kernel module so we need to compile from source

# install dependencies
sudo apt-get install autoconf gcc flex make git-core xsltproc # xsltproc is for the manpages

# check the DRBD kernel module version
cat /proc/drbd

# clone
cd /tmp && git clone -b drbd-8.4.2 git://git.drbd.org/drbd-8.4.git # assuming kernel module for DRBD 8.4.2

# compile
cd drbd-8.4
./autogen.sh
./configure --prefix=/usr --localstatedir=/var --sysconfdir=/etc
make
make doc

# install
sudo make install