Fix socket management for unlinkAndDisconnect

ts/textsecure/SocketManager.ts

@@ -187,14 +187,18 @@ export class SocketManager extends EventListener {
       authenticated = await process.getResult();
       this.status = SocketStatus.OPEN;
     } catch (error) {
-      strictAssert(this.authenticated === process, 'Someone stole our socket');
-      this.dropAuthenticated(process);
-
       window.log.warn(
         'SocketManager: authenticated socket connection failed with ' +
           `error: ${Errors.toLogFormat(error)}`
       );
 
+      // The socket was deliberately closed, don't follow up
+      if (this.authenticated !== process) {
+        return;
+      }
+
+      this.dropAuthenticated(process);
+
       if (error instanceof HTTPError) {
         const { code } = error;
 
@@ -389,6 +393,16 @@ export class SocketManager extends EventListener {
     }
   }
 
+  public async logout(): Promise<void> {
+    const { authenticated } = this;
+    if (authenticated) {
+      authenticated.abort();
+      this.dropAuthenticated(authenticated);
+    }
+
+    this.credentials = undefined;
+  }
+
   //
   // Private
   //