fix TypeError: a bytes-like object is required, not "str" error whe…

[JasonLai256]

Describe

fix TypeError: a bytes-like object is required, not "str" error when handling manager_address argument in the Manager.init method of the manager module.

Example Configuration

{
    "server":"127.0.0.1",
    "server_port":12345,
    "password":"12345678",
    "method":"aes-256-cfb",
    "fast_open":false,
    "manager_address":"127.0.0.1:6001",
}

Traceback

Traceback (most recent call last):
  File "/bin/ssserver", line 11, in <module>
    load_entry_point('shadowsocks', 'console_scripts', 'ssserver')()
  File "shadowsocks/server.py", line 54, in main
    manager.run(config)
  File "shadowsocks/manager.py", line 199, in run
    Manager(config).run()
  File "shadowsocks/manager.py", line 48, in __init__
    if ':' in manager_address:
TypeError: a bytes-like object is required, not 'str'

Fix

add the judgement of decode function for handle the str problem.

if hasattr(manager_address, 'decode'):
    manager_address = manager_address.decode('utf-8')