P2P: net status error

[heifner]

Report a more descriptive error for a host that is not found for /v1/net/status.

Before (Note http return code was 201):

✗ ./cleos net status foo
Error 3200005: http request fail
Error Details:
Error code 201
: null

Now (http return code of 201):

✗ ./cleos net status foo
"connection not found: foo"

✗ curl -s -v http://127.0.0.1:8888/v1/net/status -d"foo" | jq
*   Trying 127.0.0.1:8888...
* Connected to 127.0.0.1 (127.0.0.1) port 8888 (#0)
> POST /v1/net/status HTTP/1.1
> Host: 127.0.0.1:8888
> User-Agent: curl/7.81.0
> Accept: */*
> Content-Length: 3
> Content-Type: application/x-www-form-urlencoded
>
} [3 bytes data]
* Mark bundle as not supporting multiuse
< HTTP/1.1 201 Created
< Server: nodeos/v1.3.0-dev
< Content-Type: application/json
< Content-Length: 27
<
{ [27 bytes data]
* Connection #0 to host 127.0.0.1 left intact
"connection not found: foo"

Resolves #1587