Clicktail installed from provided .deb package (version 1.0.20180402) generates HTTP requests like:

`POST /?query=INSERT+INTO+clicktail.apache_log+FORMAT+JSONEachRow HTTP/1.1`
`Host: XXX:8123`
`User-Agent: libclick-go/1.4.0 clicktail/dev (regex)`
`Content-Length: 2425`
`Authorization: Basic XXX`
`Content-Encoding: gzip`
`Content-Type: application/json`
`X-Honeycomb-Team: `
`Accept-Encoding: gzip`

Header X-Honeycomb-Team contains only space before terminal characters:
`58 2d 48 6f 6e 65 79 63 6f 6d 62 2d 54 65 61 6d 3a 20 0d 0a`

Clickhouse server 21.4.5.46 doesn't accept those requests and returns: 
`HTTP/1.1 400 Bad Request`

There is no requirement in RFC 7230 https://tools.ietf.org/html/rfc7230#section-3.2 for field-value to contains any data. Shouldn't be those requests accepted?
Poco::Net::MessageHeader & headers, ReadBuffer & in, size_t max_fields_number, size_t max_name_length, size_t max_value_length)
{
    char ch = 0;  
    std::string name;
    std::string value;
    name.reserve(32);
    value.reserve(64);
    size_t fields = 0;
    while (true)
    {
        if (fields > max_fields_number)
            throw Poco::Net::MessageException("Too many header fields");
        name.clear();
        value.clear();
        
        while (in.peek(ch) && ch != ':' && !Poco::Ascii::isSpace(ch) && name.size() <= max_name_length)
        {
            name += ch;
            in.ignore();
        }
        if (in.eof())
            throw Poco::Net::MessageException("Field is invalid");
        if (name.empty())
        {
            if (ch == '\r')
                
                break;
            if (ch == ':')
                throw Poco::Net::MessageException("Field name is empty");
        }