[leo_gateway]leo_garteway process could be down when receiving an invalid request

[mocchira]

like this.

curl -v -0 -H "Host:" http://localhost:8080/

* About to connect() to localhost port 8080 (#0)
*   Trying 127.0.0.1... connected
> GET / HTTP/1.0
> User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3
> Accept: */*
> 
* HTTP 1.0, assume close after body
< HTTP/1.0 500 Internal Server Error
< server: Cowboy
< date: Fri, 12 Sep 2014 03:50:40 GMT
< content-length: 0
< 
* Closing connection #0

curl -v -H "Authorization: hoge" http://localhost:8080/bucket/path_to_file

< HTTP/1.1 500 Internal Server Error
< connection: keep-alive
< server: Cowboy
< date: Fri, 12 Sep 2014 03:59:30 GMT
< content-length: 0
< 
* Connection #0 to host localhost left intact
* Closing connection #0