how to use a proxy for ZN?

### Step 1: Please describe your environment

* ZeroNet version: latest
* Operating system: ubuntu16.04
* Web browser: ff and chrmn
* Tor status: not available/always/disabled not available
* Opened port: no
* Special configuration:

### Step 2: Describe the problem:
1. I have install a new ZeroNet on a laptop with proxy (v2ray) enabled on it .
2.start ZeroNet by using:
./Zeronet.sh - tor disable --proxy 127.0.0.1:10802 --disable_udp --ui_ip "*"

3. Tracker connections error detected. no matter from local or remote

my proxy works fine and I am ever wondering why Zeronet fail to get trackers through proxy?
#### Steps to reproduce:

1. _____
2. _____
3. _____

#### Observed Results:

* What happened? This could be a screenshot, a description, log output (you can send log/debug.log file to hello@zeronet.io if necessary), etc.

#### Expected Results:

* What did you expect to happen?

Start by reproducing the reported launch command with Ubuntu 16.04, the proxy at 127.0.0.1:10802, Tor disabled, and UDP disabled. Inspect the tracker connection errors and debug.log, then verify that tracker connections succeed through the proxy.

索引モデルが issue の本文から書いたものです。