doc: describe the return from ossl_provider_forall_loaded()
Also correct an incorrect statement about non-activated providers.
@@ -200,7 +200,7 @@ passed back to some of the provider functions.
ossl_provider_forall_loaded() iterates over all the currently
"activated" providers, and calls I<cb> for each of them.
If no providers have been "activated" yet, it tries to activate all
-available fallback providers and tries another iteration.
+available fallback providers before iterating over them.
ossl_provider_name() returns the name that was given with
ossl_provider_new().
@@ -287,6 +287,10 @@ it has been incremented.
ossl_provider_free() doesn't return any value.
+ossl_provider_forall_loaded() returns 1 if the callback was called for all
+activated providers. A return value of 0 means that the callback was not
+called for any activated providers.
+
ossl_provider_set_module_path(), ossl_provider_set_fallback(),
ossl_provider_activate(), ossl_provider_activate_leave_fallbacks() and
ossl_provider_deactivate() return 1 on success, or 0 on error.
