Add js-sdk mechanism for polling client well-known for config

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/MatrixClientPeg.ts

@@ -49,6 +49,7 @@ export interface IOpts {
     initialSyncLimit?: number;
     pendingEventOrdering?: "detached" | "chronological";
     lazyLoadMembers?: boolean;
+    clientWellKnownPollPeriod?: number;
 }
 
 export interface IMatrixClientPeg {
@@ -209,6 +210,7 @@ class _MatrixClientPeg implements IMatrixClientPeg {
         // the react sdk doesn't work without this, so don't allow
         opts.pendingEventOrdering = "detached";
         opts.lazyLoadMembers = true;
+        opts.clientWellKnownPollPeriod = 4 * 60 * 60; // 4 hours
 
         // Connect the matrix client to the dispatcher and setting handlers
         MatrixActionCreators.start(this.matrixClient);