Automatic proxy configuration

This configures polipo as an HTTP proxy using WPAD
(https://en.wikipedia.org/wiki/Web_Proxy_Autodiscovery_Protocol).

I've manually verified that the configuration is correct (and that
proxying occurs), however OS X and iOS do not appear to respect these
settings.

kickstart/etc/dnsmasq-00proxy.conf

@@ -0,0 +1,2 @@
+dhcp-option=252,wpad.{{lan_domain}}/wpad.dat
+cname=wpad,{{posm_fqdn}}

kickstart/etc/nginx-posm.conf

@@ -70,6 +70,11 @@ server {
   location /fp/_/ {
     alias /opt/fp/data/;
   }
+
+  location /wpad.dat {
+    return 200 'function FindProxyForURL(url, host) {\n  if (shExpMatch(host, "{{posm_fqdn}}")) {\n    return "DIRECT";\n  }\n\n  return "PROXY {{posm_wlan_ip}}:1080; DIRECT";\n}';
+    add_header Content-Type application/x-ns-proxy-autoconfig;
+  }
 }
 
 # vim: set sts=2 sw=2 et si nu:

kickstart/etc/polipo/config

@@ -0,0 +1,4 @@
+logSyslog = true
+logFile = /var/log/polipo/polipo.log
+proxyAddress = ::0
+proxyPort = 1080

kickstart/scripts/proxy-deploy.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+deploy_proxy_ubuntu() {
+  apt-get install --no-install-recommends -y polipo
+
+  expand etc/polipo/config /etc/polipo/config
+  expand etc/dnsmasq-00proxy.conf /etc/dnsmasq.d/00-proxy.conf
+
+  service polipo restart
+  service dnsmasq restart
+}
+
+deploy proxy