Should the server params always be defined?

[gsdevme]

http://www.faqs.org/rfcs/rfc3875.html

4.1. Request Meta-Variables

 Meta-variables contain data about the request passed from the server
 to the script, and are accessed by the script in a system-defined
 manner. Meta-variables are identified by case-insensitive names;
 there cannot be two different variables whose names differ in case
 only. Here they are shown using a canonical representation of
 capitals plus underscore ("_"). A particular system can define a
 different representation.

 meta-variable-name = "AUTH_TYPE" | "CONTENT_LENGTH" |
 "CONTENT_TYPE" | "GATEWAY_INTERFACE" |
 "PATH_INFO" | "PATH_TRANSLATED" |
 "QUERY_STRING" | "REMOTE_ADDR" |
 "REMOTE_HOST" | "REMOTE_IDENT" |
 "REMOTE_USER" | "REQUEST_METHOD" |
 "SCRIPT_NAME" | "SERVER_NAME" |
 "SERVER_PORT" | "SERVER_PROTOCOL" |
 "SERVER_SOFTWARE" | scheme |
 protocol-var-name | extension-var-name
 protocol-var-name = ( protocol | scheme ) "_" var-name
 scheme = alpha *( alpha | digit | "+" | "-" | "." )
 var-name = token
 extension-var-name = token

Figs states the following about getServerParams

 * Retrieves data related to the incoming request environment,
 * typically derived from PHP's $_SERVER superglobal. The data IS NOT
 * REQUIRED to originate from $_SERVER.

Im wondering if in the above they should at least exist or is that not the job of this package?

I've made a PR to the package as they can guard for it also.. but Im wondering whats best also
zendframework/zend-expressive#489

[clue]

Thanks for bringing this up! 👍 The first batch of server params has been implemented via #174 and I'm sure there's room for improvement if certain params are missing. May I ask you to file a PR so we can look into this?

[gsdevme]

Sure, are you happy with the idea of defining all in the meta variables in RFC3875? Some of them are 'more worth' than others though.. CONTENT-LENGTH for the request and such and AUTH_TYPE like are not used much

[clue]

Not sure what's reasonable here without diving deeper into this tbh. There's no need to implement this according to the CGI specs, but there are certainly a group of parameters not otherwise available or so commonly used that it makes sense to also add them here. I'd suggest going for these first 👍

[clue]

Closed via #195