Make /oidc/jwks support ANY http verb

app/unit/OpenIDConnectUnit.js

@@ -114,6 +114,11 @@ class OpenIDConnectUnit extends Unit {
                 }
             }
 
+            // Stupid /jwks only listens on GET which is incompatible w/ some apps
+            if ( req.url === '/jwks' ) {
+                req.method = 'GET'
+            }
+
             return callback(req, res, next)
         }
     }