* module_utils.urls - Encode the proxy connect as binary
Under Python3 the sendall method expects binary not a string.
Prior to this change the below exception was being thrown;
Traceback (most recent call last):
File "/tmp/ansible_umxox7_x/ansible_modlib.zip/ansible/module_utils/urls.py", line 1044, in fetch_url
client_key=client_key, cookies=cookies)
File "/tmp/ansible_umxox7_x/ansible_modlib.zip/ansible/module_utils/urls.py", line 951, in open_url
r = urllib_request.urlopen(*urlopen_args)
File "/opt/blue-python/3.6/lib/python3.6/urllib/request.py", line 223, in urlopen
return opener.open(url, data, timeout)
File "/opt/blue-python/3.6/lib/python3.6/urllib/request.py", line 524, in open
req = meth(req)
File "/tmp/ansible_umxox7_x/ansible_modlib.zip/ansible/module_utils/urls.py", line 729, in http_request
s.sendall((self.CONNECT_COMMAND % (self.hostname, self.port)).decode())
AttributeError: 'str' object has no attribute 'decode'
Encoding the value is inline with the lines below (Proxy-Authorization etc) which are being sent as binary.
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