postfix: fixed installing to the filesystem image

Signed-off-by: Denis Shulyaka <Shulyaka@gmail.com>
libartnet: new package added

Signed-off-by: Martijn Zilverschoon <martijn@friedzombie.com>
libartnet: Removed uneeded configure argument

Signed-off-by: Martijn Zilverschoon <martijn@friedzombie.com>
Merge pull request #582 from Shulyaka/master

postfix: fixed installing to the filesystem image
Merge pull request #583 from Frieds-Technology/libartnet

libartnet: new package added