New Feature: allow customizing the name of the strategy.

Using this option, you instantiate the strategy multiple times with
different configurations.

README.md

@@ -75,6 +75,9 @@ passport.use(new SamlStrategy(
   * `cacheProvider`: Defines the implementation for a cache provider used to store request Ids generated in SAML requests as part of `InResponseTo` validation.  Default is a built-in in-memory cache provider.  For details see the 'Cache Provider' section.
  * **Passport**
   * `passReqToCallback`: if truthy, `req` will be passed as the first argument to the verify callback (default: `false`)
+  * `name`: Optionally, provide a custom name. (default: `saml`). Useful If you want to instantiate the strategy multiple times with different configurations,
+            allowing users to authenticate against multiple different SAML targets from the same site. You'll need to use a unique set of URLs
+            for each target, and use this custom name when calling `passport.authenticate()` as well.
  * **Logout**
   * `logoutUrl`: base address to call with logout requests (default: `entryPoint`)
   * `additionalLogoutParams`: dictionary of additional query params to add to 'logout' requests

lib/passport-saml/strategy.js

@@ -12,7 +12,15 @@ function Strategy (options, verify) {
     throw new Error('SAML authentication strategy requires a verify function');
   }
 
-  this.name = 'saml';
+  // Customizing the name can be useful to support multiple SAML configurations at the same time.
+  // Unlike other options, this one gets deleted instead of passed along.
+  if  (options.name) {
+    this.name  = options.name;
+    delete options.name;
+  }
+  else {
+    this.name = 'saml';
+  }
 
   passport.Strategy.call(this);