fix Tor control auth cookie authentication even if HashedControlPassw…

…ord is set

fix custom auth cookie authentication path

Previously the following line in Tor config...

```
HashedControlPassword
16:88A1B9F6EBD74C6960E1E60CC725B6C94A990C65223358EFF0DF41E8BA
```

Was leading the the following error:

```
Sep 13 22:02:08 host onion-grater[10460]: Exception happened during
processing of request from ('10.137.0.45', 48828)
Sep 13 22:02:08 host onion-grater[10460]: Traceback (most recent call last):
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/python3.5/socketserver.py", line 625, in process_request_thread
Sep 13 22:02:08 host onion-grater[10460]:
self.finish_request(request, client_address)
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/python3.5/socketserver.py", line 354, in finish_request
Sep 13 22:02:08 host onion-grater[10460]:
self.RequestHandlerClass(request, client_address, self)
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/python3.5/socketserver.py", line 681, in __init__
Sep 13 22:02:08 host onion-grater[10460]:     self.handle()
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/onion-grater", line 651, in handle
Sep 13 22:02:08 host onion-grater[10460]:     self.controller =
self.connect_to_real_control_port()
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/onion-grater", line 592, in connect_to_real_control_port
Sep 13 22:02:08 host onion-grater[10460]:
controller.authenticate(cookie)
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/python3/dist-packages/stem/control.py", line 1071, in authenticate
Sep 13 22:02:08 host onion-grater[10460]:
stem.connection.authenticate(self, *args, **kwargs)
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/python3/dist-packages/stem/connection.py", line 575, in
authenticate
Sep 13 22:02:08 host onion-grater[10460]:
authenticate_password(controller, password, False)
Sep 13 22:02:08 host onion-grater[10460]:   File
"/usr/lib/python3/dist-packages/stem/connection.py", line 711, in
authenticate_password
Sep 13 22:02:08 host onion-grater[10460]:     password =
password.replace('"', '\\"')
Sep 13 22:02:08 host onion-grater[10460]: TypeError: a bytes-like object
is required, not 'str'
```

```
ls -la /var/run/tor/
```
```
total 148
drwxr-sr-x  2 debian-tor debian-tor    140 Sep 13 22:15 .
drwxr-xr-x 28 root       root          760 Sep 13 22:00 ..
srw-rw----  1 debian-tor debian-tor      0 Sep 13 22:15 control
-rw-r-----  1 debian-tor debian-tor     32 Sep 13 22:15 control.authcookie
-rw-r-----  1 debian-tor debian-tor 143123 Sep 13 22:15 log
srw-rw-rw-  1 debian-tor debian-tor      0 Sep 13 22:15 socks
-rw-r--r--  1 debian-tor debian-tor      6 Sep 13 22:15 tor.pid
```
```
DataDirectory /var/lib/tor
PidFile /var/run/tor/tor.pid
RunAsDaemon 1
User debian-tor

ControlSocket /var/run/tor/control GroupWritable RelaxDirModeCheck
ControlSocketsGroupWritable 1
SocksPort unix:/var/run/tor/socks WorldWritable
SocksPort 9050

CookieAuthentication 1
CookieAuthFileGroupReadable 1
CookieAuthFile /var/run/tor/control.authcookie

Log notice file /var/log/tor/log
```

The HashedControlPassword confused python-stem even
though cookie authentication was functional without that HashedControlPassword.

There is no need to manually read Tor authentication cookie file.

        with open(global_args.control_cookie_path, "rb") as f:
            cookie = f.read()

python-stem can do that for us.

Line

```
controller.authenticate(cookie)
```

was wrong. `controller.authenticate` does not take

Syntax from manual:

https://stem.torproject.org/api/connection.html#stem.connection.authenticate

```
stem.connection.authenticate(controller, password=None, chroot_path=None, protocolinfo_response=None)
```

usr/lib/onion-grater

@@ -132,6 +132,7 @@ import socket
 import socketserver
 import stem
 import stem.control
+import stem.connection
 import struct
 import sys
 import textwrap
@@ -584,12 +585,8 @@ class FilteredControlPortProxyHandler(socketserver.StreamRequestHandler):
         ))
 
     def connect_to_real_control_port(self):
-        with open(global_args.control_cookie_path, "rb") as f:
-            cookie = f.read()
-        controller = stem.control.Controller.from_socket_file(
-            global_args.control_socket_path
-        )
-        controller.authenticate(cookie)
+        controller = stem.connection.connect(control_socket=global_args.control_socket_path)
+        stem.connection.authenticate_cookie(controller, cookie_path=global_args.control_cookie_path)
         return controller
 
     def handle(self):