IPv6 support (fate #316261)
add LC_ALL=POSIX to iscsiadm command
add _spec
use require_relative
delete obsolete lines, log ArgumentError
use 'host' (instead 'host -4) to work also for IPv6 only machines
test case added
Makefile.am for test dir
Merge pull request #4 from gabi2/master

IPv6 support (fate #316261)