Fixed https apt proxy to same host as http

linux/files/95proxies

 {%- from "linux/map.jinja" import network with context %}
 Acquire::http::proxy "http://{{ network.proxy.host }}:{{ network.proxy.port }}/";
 Acquire::ftp::proxy "ftp://{{ network.proxy.host }}:{{ network.proxy.port }}/";
-Acquire::https::proxy "https://{{ network.proxy.host }}:{{ network.proxy.port }}/";
+Acquire::https::proxy "http://{{ network.proxy.host }}:{{ network.proxy.port }}/";