moving some logic to tesla adapter

- checking original inside gun adapter
- flushing streams on max_body error

test/http/adapter_helper/gun_test.exs

@@ -35,8 +35,6 @@ defmodule Pleroma.HTTP.AdapterHelper.GunTest do
                {&:ssl_verify_hostname.verify_fun/3, [check_hostname: 'example.com']}
 
       assert File.exists?(tls_opts[:cacertfile])
-
-      assert opts[:original] == "example.com:443"
     end
 
     test "https ipv4 with default port" do
@@ -46,8 +44,6 @@ defmodule Pleroma.HTTP.AdapterHelper.GunTest do
 
       assert opts[:tls_opts][:verify_fun] ==
                {&:ssl_verify_hostname.verify_fun/3, [check_hostname: '127.0.0.1']}
-
-      assert opts[:original] == "127.0.0.1:443"
     end
 
     test "https ipv6 with default port" do
@@ -58,8 +54,6 @@ defmodule Pleroma.HTTP.AdapterHelper.GunTest do
       assert opts[:tls_opts][:verify_fun] ==
                {&:ssl_verify_hostname.verify_fun/3,
                 [check_hostname: '2a03:2880:f10c:83:face:b00c:0:25de']}
-
-      assert opts[:original] == "2a03:2880:f10c:83:face:b00c:0:25de:443"
     end
 
     test "https url with non standart port" do
@@ -129,7 +123,6 @@ defmodule Pleroma.HTTP.AdapterHelper.GunTest do
       assert tls_opts[:depth] == 20
       assert tls_opts[:reuse_sessions] == false
 
-      assert opts[:original] == "some-domain.com:443"
       assert opts[:close_conn] == false
       assert is_pid(opts[:conn])
     end

test/http/connection_test.exs

@@ -134,7 +134,6 @@ defmodule Pleroma.HTTP.ConnectionTest do
       assert tls_opts[:depth] == 20
       assert tls_opts[:reuse_sessions] == false
 
-      assert opts[:original] == "some-domain.com:443"
       assert opts[:close_conn] == false
       assert is_pid(opts[:conn])
     end