Request may not include Host parameter

[zuevmaxim]

Ktor Version and Engine Used (client or server and name)
io.ktor:ktor-server-cio:1.3.2

Describe the bug
Request must include Host parameter(see https://tools.ietf.org/html/rfc2616#section-14.23)

To Reproduce
Steps to reproduce the behavior:
Run code:

import io.ktor.http.cio.parseRequest
import io.ktor.utils.io.ByteReadChannel
import kotlinx.coroutines.runBlocking

fun main() {
    test(
        """
        GET / HTTP/1.1
        

        """.trimIndent()
    )
}

fun test(http: String) {
    val request = runBlocking { parseRequest(ByteReadChannel(http)) }!!
    println("method=${request.method};uri={${request.uri}};headers=[${request.headers}]")
}

Expected behavior
An error expected - exception or null result.

[oleg-larshin]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.