distro: add render_interface_vlan.
distro: add physdev.
distro: support vlan type interface.
distro: split vlan type included case.
distro: add configure_vlan_conf.
distro: configure vlan networking for vlan type case.
distro: configure nic table with "physdev" param.
Merge pull request #23 from hansode/feature-distro-vlan-interface

Feature distro vlan interface
distro: add onboot param.
distro: enable to set bootproto in nictab.
distro: remove unnecessary code.
distro: add nictab.vlan.txt.example.
Merge pull request #24 from hansode/distro-vlan-bootproto

Distro vlan bootproto
distro: remove convert_rpmdb_hash.
distro: make sure to rebuild rpmdb in clean_packages.
Merge pull request #25 from hansode/feature-rebuild-rpmdb

Feature rebuild rpmdb
Revert "distro: remove convert_rpmdb_hash."

This reverts commit 755e51a1f791ff9054701680a28f4c353ec12f4d.
Merge pull request #26 from hansode/fix-rhel5-rpmdb

Revert "distro: remove convert_rpmdb_hash."
Merge pull request #55 from hansode/master

support ifcfg file for vlan