- TLS revised (again)

- TLS Session resumption issues resolved
- Credential prompt has "Remember" checkbox initially selected when credentials originate from Windows Credential Manager
- Last authentication attempt failure notice is more general and no longer insinuate user credentials are the likely cause of the failure
- Additional log messages added

lib/TTLS/src/Credentials.cpp

@@ -226,15 +226,12 @@ std::wstring eap::credentials_ttls::get_identity() const
 }
 
 
-bool eap::credentials_ttls::combine(
+pair<eap::credentials::source_t, eap::credentials::source_t> eap::credentials_ttls::combine(
     _In_       const credentials_ttls   *cred_cached,
     _In_       const config_method_ttls &cfg,
     _In_opt_z_       LPCTSTR            pszTargetName)
 {
-    bool
-        is_outer_set = credentials_tls::combine(cred_cached, cfg, pszTargetName),
-        is_inner_set =
-            dynamic_cast<const credentials_pap*>(m_inner.get()) ? ((credentials_pap*)m_inner.get())->combine(cred_cached ? (credentials_pap*)cred_cached->m_inner.get() : NULL, (const config_method_pap&)*cfg.m_inner, pszTargetName) : false;
-
-    return is_outer_set && is_inner_set;
+    return pair<source_t, source_t>(
+        credentials_tls::combine(cred_cached, cfg, pszTargetName),
+        dynamic_cast<const credentials_pap*>(m_inner.get()) ? ((credentials_pap*)m_inner.get())->combine(cred_cached ? (credentials_pap*)cred_cached->m_inner.get() : NULL, (const config_method_pap&)*cfg.m_inner, pszTargetName) : source_unknown);
 }