nix: Make nix the root

Which means now I'll have to think about real prefixes in commit names.

unprocessed/config/scripts/tunnel

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+# Dynamically determines if the ssh connection
+# is to be proxied through `proxytunnel`
+# To be used with ssh_config ProxyCommand
+
+host="$1"
+port="$2"
+
+if [ -z "$http_proxy" ]; then
+    socat "TCP:$host:$port" -
+else
+    proxy=$(echo "$http_proxy" | sed 's/^https\?:\/\///' | sed 's/\/$//')
+    port=443 # Most won't want this
+    echo "$proxy" | grep '@'
+    if [ $? == 0 ]; then
+        user=$(echo $proxy | cut -d '@' -f 2)
+        proxy=$(echo $proxy | cut -d '@' -f 1)
+        proxytunnel -p $proxy -P $user -d $host:$port
+    else
+        proxytunnel -p $proxy -d $host:$port
+    fi
+fi
+