fix stdin parsing

[dogancanbakir]

Closes #2020

[noaho]

This pull request breaks -vhost-input for me, see #2020

[dogancanbakir]

@noaho I'll update this PR -was gatherin more info on this feature.

[noaho]

If it helps my understanding of the feature is this:

Sometimes you have hosts that you need to specify by IP, to do vhost discovery. (Send different Hosts: header for the same IP)

You might also want to process multiple hosts / vhosts in one session without starting up multiple HTTPX.

So you specify each vhost/IP pair on stdin like this:
cat inputfile.txt | httpx -vhost-input -title

You would of course have a input file with multiple vhosts you want to try on an IP (and multiple hosts you want to test) like this:

inputfile.txt

example.org,https://93.184.215.14
example2.org,https://93.184.215.14
www.google.com,https://74.125.68.147

This should give output like this:

    __    __  __       _  __
   / /_  / /_/ /_____ | |/ /
  / __ \/ __/ __/ __ \|   /
 / / / / /_/ /_/ /_/ /   |
/_/ /_/\__/\__/ .___/_/|_|
             /_/

                projectdiscovery.io

[INF] Current httpx version v1.6.9 (latest)
[WRN] UI Dashboard is disabled, Use -dashboard option to enable
https://93.184.215.14 [Example Domain]
https://74.125.68.147 [Google]
http://93.184.215.14 [404 - Not Found]