(cgiserv) fix redirect_resp

[Eronana]

Motivation and Context

I got '500 Internal Server Error' caused by: net/http: HTTP/1.x transport connection broken: unexpected EOF from traefik when I use it to proxy cgiserv, and I also got error when I use nodejs to send request to http://cgiserv_ip:9425.

Description

It should ends with double CRLFs(\r\n\r\n), but there is only one CRLF.
Why? Please see here: https://en.wikipedia.org/wiki/List_of_HTTP_header_fields#General_format

How Has This Been Tested?

It works fine with traefik after I added the missing CRLF.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist:

• I have updated the documentation accordingly.

• I have added tests to cover my changes.
• All new and existing tests passed.

[chogata]

Thank you for pointing this out.

This needs to be added to "err_resp" function as well. Can you modify your commit so it contains both fixes?

[Eronana]

Thank you for pointing this out.

This needs to be added to "err_resp" function as well. Can you modify your commit so it contains both fixes?

sure, i’ll update this pr tmr.