docs: Update /integrations links to new pushState routes.

Update Email, Beanstalk, Hubot, JIRA, and Trello integrations
links.

The Hubot integrations section (/integrations#hubot-integrations)
was removed  in an earlier redesign of /integrations. This commit
replaces the link with the hubot-scripts organization on
Github, which displays the comprehensive list of all integrations
available via Hubot.

Fixes #5875.

docs/architecture-overview.md

@@ -196,7 +196,7 @@ Redis is used for a few very short-term data stores, such as in the
 basis of `zerver/lib/rate_limiter.py`, a per-user rate limiting scheme
 [example](http://blog.domaintools.com/2013/04/rate-limiting-with-redis/)),
 and the [email-to-Zulip
-integration](https://zulipchat.com/integrations/#email).
+integration](https://zulipchat.com/integrations/doc/email).
 
 Redis is configured in `zulip/puppet/zulip/files/redis` and it's a
 pretty standard configuration except for the last line, which turns off

docs/email.md

@@ -6,7 +6,7 @@ guide to [sending outgoing email](prod-email.html). If you're trying to
 configure an email integration to receive incoming email (e.g. so that users
 can reply to missed message emails via email), you might be interested in
 our instructions for
-[setting up an email integration](https://zulipchat.com/integrations/#email).
+[setting up an email integration](https://zulipchat.com/integrations/doc/email).
 
 On to the documentation. Zulip's email system is fairly straightforward,
 with only a few things you need to know to get started.

docs/integration-docs-guide.md

@@ -254,7 +254,7 @@ Here are a few common macros used to document Zulip's integrations:
   https://bot_email:bot_api_key@yourZulipDomain.zulipchat.com/api/v1/external/beanstalk
   ```
   A good example is
-  [Zulip's Beanstalk integration](https://zulipchat.com/integrations/#beanstalk)
+  [Zulip's Beanstalk integration](https://zulipchat.com/integrations/doc/beanstalk)
 
 [1]: https://github.com/zulip/zulip/blob/master/templates/zerver/help/include/create-stream.md
 [2]: https://github.com/zulip/zulip/blob/708f3a4bb19c8e823c9ea1e577d360ac4229b199/zerver/lib/integrations.py#L51

templates/zerver/integrations/hubot.md

@@ -39,5 +39,5 @@ result like this:
 [Source code for the hubot-zulip adapter is available on GitHub][1]
 [1]: https://github.com/zulip/hubot-zulip
 
-[Check out additional Zulip integrations available via Hubot][2]
-[2]: #hubot-integrations
+[Check out all integrations available via Hubot][2]
+[2]: https://github.com/hubot-scripts

templates/zerver/integrations/jira-plugin.md

@@ -1,6 +1,6 @@
 *If you are running JIRA version 5.2 or greater, or using the hosted
 JIRA provided by Atlassian, we recommend using the
-[web-hook method](#jira) above instead. This plugin supports older
+[web-hook method](./jira) above instead. This plugin supports older
 versions of JIRA.*
 
 {!create-stream.md!}

templates/zerver/integrations/trello-plugin.md

@@ -1,6 +1,6 @@
 This legacy integration for Trello works by running a script that
 communicates with the Trello API in a cron job. We recommend
-[the new Trello webhook integration](#trello) (which will
+[the new Trello webhook integration](./trello) (which will
 eventually replace this entirely). Please
 [report any issues](https://github.com/zulip/zulip/issues/new)
 which cause you to prefer this integration over the webhook

zerver/webhooks/jira/doc.md

@@ -1,7 +1,7 @@
 *If you are running JIRA version 5.2 or greater, or if you are
 using the hosted JIRA provided by Atlassian, you can use the built-in
 web-hook support to connect to Zulip — read on. For older,
-self-hosted JIRA installs, you can use our [JIRA Plugin](#jira-plugin).*
+self-hosted JIRA installs, you can use our [JIRA Plugin](./jira-plugin).*
 
 {!create-stream.md!}
 

zerver/webhooks/trello/doc.md

@@ -1,6 +1,6 @@
 This webhook integration for Trello is the recommended way to
 integrate with Trello, and should support all the features of
-the [legacy Trello cron-based integration](#trello-plugin).
+the [legacy Trello cron-based integration](./trello-plugin).
 
 {!create-stream.md!}