HTTP and HTTPS tracker completely broken if use address as the hostname instead of IP

Hello all.

## The issue

Everything tested on **r4555**.

If you have opened the port and you define the tracker address as `open.acgnxtracker.com` instead of IP address you will send to the tracker your opened port as `1` (means not-connectable) instead of your correct port.

I have disabled TOR, Bootstrap, AnnounceLocal, AnnounceShare, AnnounceZero and I was wondering, why after 1 hour I have exactly 0 peers for ZeroHello, ZeroName?

---

## How to reproduce?

Please check that line
https://github.com/HelloZeroNet/ZeroNet/blob/454c0b2e7e000fda7000cba49027541fbf327b96/plugins/AnnounceBitTorrent/AnnounceBitTorrentPlugin.py#L104

I have put that lines below to debug:
```
self.site.log.debug("SiteAnnouncerPlugin - Calculated port: %s" % port)
self.site.log.debug("SiteAnnouncerPlugin - Tracker IP type: %s" % helper.getIpType(tracker_ip))
self.site.log.debug("SiteAnnouncerPlugin - Opened Services: %s" % self.getOpenedServiceTypes())
self.site.log.debug("SiteAnnouncerPlugin - Server Port: %s" % self.fileserver_port)
self.site.log.debug("SiteAnnouncerPlugin - tracker_ip: %s" % tracker_ip)
```

And got:
```
[2021-02-20 16:47:56,377] DEBUG Site:XXXXXX..XXXX SiteAnnouncerPlugin - Calculated port: 1
[2021-02-20 16:47:56,377] DEBUG Site:XXXXXX..XXXX SiteAnnouncerPlugin - Tracker IP type: unknown
[2021-02-20 16:47:56,377] DEBUG Site:XXXXXX..XXXX SiteAnnouncerPlugin - Opened Services: ['ipv4']
[2021-02-20 16:47:56,377] DEBUG Site:XXXXXX..XXXX SiteAnnouncerPlugin - Server Port: 12345
[2021-02-20 16:47:56,377] DEBUG Site:XXXXXX..XXXX SiteAnnouncerPlugin - tracker_ip: open.acgnxtracker.com
```

## What does it mean?

Function `helper.getIpType("open.acgnxtracker.com")` returns `unknown` because `open.acgnxtracker.com` is a hostname not IP address. Is unknown so we send to tracker `port=1` instead of `port=12345`.

In Config.py we have configured 3 trackers:
```
"http://h4.trakx.nibba.trade:80/announce", # US/VA
"http://open.acgnxtracker.com:80/announce", # DE
"http://tracker.bt4g.com:2095/announce", # Cloudflare
```

When you try to send a request to the tracker you will see almost all of the ports equal 1 - so most of the servers through HTTP/S trackers are not reachable.

---

BTW

https://github.com/HelloZeroNet/ZeroNet/blob/454c0b2e7e000fda7000cba49027541fbf327b96/plugins/AnnounceBitTorrent/AnnounceBitTorrentPlugin.py#L103

If you skip port number e.g. `http://open.acgnxtracker.com/announce` you will get the error:
```
Tracker http://open.acgnxtracker.com/announce announce failed: ValueError: not enough values to unpack (expected 2, got 1)
```

I think we should add default port 80 if HTTP and 443 if https

Start in plugins/AnnounceBitTorrent/AnnounceBitTorrentPlugin.py around lines 103-104, then inspect helper.getIpType and the tracker URL port parsing. Reproduce the hostname and omitted-port cases described in the issue. Done means HTTP and HTTPS tracker hostnames produce the configured server port, and URLs without explicit ports no longer raise the reported unpacking error.

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