IPv6 support for the backend

  Still not listening on IPv6, would need help.
Adding isipv6 to $param broke bool_array_search

 Added 'strict' optional parameter.
 See comment in code.
Fixed issue with lxreverse.conf

  Did not know how to identify ipv4/6 ranges.
  The problem is mostlikely rooted before, ipv6 $base is dotted already.
IPv6 support in core

  Needs review.
  Master (php socket) and slave and backend listens to IPv6.
OpenVZ VSwap support

  Added new flag, needs /script/cleanup (@Danny: or what? I found that updates the schema)
  Handles VSwap correctly.
  Works on Centos 5 and 6 boths. (Ofc, 5 wont have vswap feature.)
Corrected typo
do not copy kernel images and modules into XEN when template name contains pygrub. grub & kernel should comes with template image
now XEN works with CentOS 6 & hypervm too!
now XEN works with CentOS 6 & hypervm too!
CentOS Xen repository
remove openvz.repo when installing xen. it is unnecessary
with centos6 / rhel6 libvirtd is not installed so first check if init script exist and then switch if off (when exist)
removed permanent path for lvs. for rhel5 it is: /usr/sbin/lvs but for rhel6 it is /sbin/lvs. This should be taken from PATH
For RHEL6 / CentOS6 vgdisplay is under /sbin/ instead of /usr/sbin
add missing brackets
Disabled could_not_stop_vps lxException. It have to be rewritten
getStatus() should return on when exit code of xm list == 0, if not then return off
fix XEN grub for CentOS6/RHEL6 script
fix XEN grub for CentOS6/RHEL6
revert unnecessary comment because the code has been back