Proposal: Explicit assignment of IPv4 and|or IPv6 addresses to the required site

[click0]

Add functionality: instead site create <name> [<template>] - create a site from template

to change site create <name> [ipv4=<ipv4 address> ipv6=<ipv6 address>] [<template>] - create a site from template

Also in the templates, it will be possible to use the reserved variables _IPv4_ and _IPv6_

The case when many IPv4 or IPv6 addresses are assigned to one site are not yet considered.