[ruby/rack] Mark Rack as Realistic instead of Stripped

[p8]

The requirements state that:

Implementations that are not based on a realistic HTTP implementation
will be marked as Stripped.

The Rack tests use webservers (Puma, Unicorn, Falcon) based on realisitic HTTP implementation, and the Rack specification does as well.

So if we are going to mark some frameworks as non realistic because they don't conform to a realistic HTTP implementation, why should Rack be marked as Stripped when it does conform?

[joanhey]

LGTM this change.
It was changed a lo of time ago, without any explication in:
e684b54#diff-33dc9963b3f86ae43192c37d5134b3560ec3f56259b23ce9bf2afdca68458f27R12

[p8]

Also frameworks hardcoding the Content-Length should probably be marked as Stripped?

FrameworkBenchmarks/frameworks/Go/goev/src/main.go

Line 23 in 0c959df

const contentLengthS = "\r\nContent-Length: 13\r\n\r\nHello, World!"

FrameworkBenchmarks/frameworks/Rust/actix/src/main_server.rs

Line 25 in 0c959df

b"HTTP/1.1 200 OK\r\nServer: A\r\nContent-Type: application/json\r\nContent-Length: 27\r\n";

FrameworkBenchmarks/frameworks/Rust/ntex/src/main_plt.rs

Line 13 in 0c959df

b"HTTP/1.1 200 OK\r\nServer: N\r\nContent-Type: application/json\r\nContent-Length: 27\r\n";

edit: some of these are already marked as stripped.