Show authenticated user in API logs

[mgmacias95]

Hello,

This PR implements a new option in the API logs: show the user who made the request. For example, the following request:

# curl -u marta:bar "localhost:55000?pretty"
{
   "error": 0,
   "data": {
      "msg": "Welcome to Wazuh HIDS API",
      "api_version": "v3.3.0",
      "hostname": "node01",
      "timestamp": "Fri Feb 16 2018 19:11:47 GMT+0100 (CET)"
   }
}

will produce the following log line:

WazuhAPI 2018-02-16 19:11:47 marta: [::1] GET /?pretty - 200 - error: '0'.

If a wrong user is used, the log will show the last correct user:

# curl -u pepe:bar "localhost:55000?pretty"
401 Unauthorized
# tail -n1 /var/ossec/logs/api.log st:55000?pretty"
WazuhAPI 2018-02-16 19:15:15 marta: [::1] User: "pepe" - Authentication failed.

Best regards,
Marta

[jesuslinares]

Fix this:

WazuhAPI 2018-02-16 19:15:15 marta: [::1] User: "pepe" - Authentication failed.

[mgmacias95]

@jesuslinares Fixed in commit e9e4dcc:

WazuhAPI 2018-07-13 01:50:32 pepe: [::1] User: "pepe" - Authentication failed.