initial parsing code of vrrp_instance
add writing of vrrp_instance config
vrrp_instance virtual_ipaddress and virtual_routes parsing
found a bug of misc_path with double quotes unable to display in form
correctly
fix the bug of misc_path with space in quoted string, the characters
after space was cut off in html form, see
http://bytes.com/topic/php/answers/472748-forms-value-php-echo-stops-after-first-space
finish writing of vrrp_instance virtual_ipaddress and virtual_routes
Add vrrp GUI section and vrrp virtual ipaddress
since $vrrp_instance[$selected_host]['virtual_ipaddress'] is index 0
started array, but the $selected start with 1, there is mismatch, fix
it so the right virtual ipaddress entry can be added/removed/displayed
correctly