Fix dialyzer warnings about unknown type ered:host/0

Add the missing type export and re-enable the unknown type
warning disabled for OTP 26.

The fixed warnings was found in:
- src/ered_client.erl
  Line 80 Column 24: Unknown type ered:host/0
- src/ered_connection.erl
  Line 60 Column 17: Unknown type ered:host/0

Additionally add plt_extra_apps to handle the warnings:
- test/ered_client_tests.erl
  Line 0: Unknown function eunit:test/1
- ./ssl.erl
  Line 927 Column 77: Unknown type public_key:oid/0

Signed-off-by: Björn Svensson <[email protected]>

Author: bjosv

.github/workflows/ci.yml

@@ -68,4 +68,11 @@ jobs:
       - name: Run common tests
         run: rebar3 ct
       - name: Run dialyzer
-        run: rebar3 as test dialyzer
+        run: |
+          # Remove remnants from "rebar3 ct" that creates problems for the dialyzer.
+          # rebar3 might add ct_hooks that are not found by the dialyzer and will
+          # create warnings if not rebuilt. Example of a warning:
+          #   test/ered_cluster_SUITE.erl
+          #   Line 72 Column 13: Unknown function cthr:pal/1
+          rebar3 as test clean
+          rebar3 as test dialyzer

rebar.config

@@ -10,7 +10,4 @@
 
 {profiles, [{check, [{plugins, [{rebar3_fmt, "1.18.0"}]}]}]}.
 
-%% In OTP-26 the 'unknown function or type' warning is on by default.
-%% We disable this again due to missing supervisor types in OTP-26, see:
-%% https://github.com/erlang/otp/pull/6893
-{dialyzer, [{warnings, [no_unknown]}]}.
+{dialyzer, [{plt_extra_apps, [common_test, eunit, public_key]}]}.

src/ered.erl

@@ -11,6 +11,7 @@
 
 -export_type([opt/0,
               addr/0,
+              host/0,
               command/0,
               reply/0,
               reply_fun/0,