Fix url links and spelling error in docs

1) Replace old http links with the newest https ones in docs.
2) fix a spelling error in HACKING.rst.

Change-Id: Idf087b08fd0053c95b9d9d139fa4269c258c95af

HACKING.rst

@@ -14,7 +14,7 @@ We use OpenStack's Gerrit for the code contributions:
 
 `<https://review.openstack.org/#/q/status:open+project:openstack/watcher-dashboard,n,z>`__
 
-and we follow the `OpenStack Gerrit Workflow <http://docs.openstack.org/infra/manual/developers.html#development-workflow>`__.
+and we follow the `OpenStack Gerrit Workflow <https://docs.openstack.org/infra/manual/developers.html#development-workflow>`__.
 
 If you're interested in the code, here are some key places to start:
 
@@ -33,7 +33,7 @@ Using ``tox``:
 
     This is the easiest way to run tests. When run, tox installs dependencies,
     prepares the virtual python environment, then runs test commands. The gate
-    tests in gerrit usually also use tox to run tests. For avaliable tox
+    tests in gerrit usually also use tox to run tests. For available tox
     environments, see ``tox.ini``.
 
 By running ``run_tests.sh``:

doc/source/contributor/contributing.rst

@@ -24,8 +24,8 @@ signed OpenStack's contributor's agreement.
 
 .. seealso::
 
-   * http://docs.openstack.org/infra/manual/developers.html
-   * http://wiki.openstack.org/CLA
+   * https://docs.openstack.org/infra/manual/developers.html
+   * https://wiki.openstack.org/wiki/CLA
 
 LaunchPad Project
 -----------------
@@ -37,17 +37,17 @@ notifications of important events.
 
 .. seealso::
 
-   * http://launchpad.net
-   * http://launchpad.net/watcher
-   * http://launchpad.net/watcher-dashboard
-   * http://launchpad.net/~openstack
+   * https://launchpad.net/
+   * https://launchpad.net/watcher
+   * https://launchpad.net/watcher-dashboard
+   * https://launchpad.net/~openstack
 
 
 Project Hosting Details
 -----------------------
 
 Bug tracker
-    http://launchpad.net/watcher-dashboard
+    https://launchpad.net/watcher-dashboard
 
 Blueprints
     https://blueprints.launchpad.net/watcher-dashboard
@@ -56,7 +56,7 @@ Mailing list (prefix subjects with ``[watcher]`` for faster responses)
     http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
 
 Wiki
-    http://wiki.openstack.org/Watcher
+    https://wiki.openstack.org/wiki/Watcher
 
 Code Hosting
     https://git.openstack.org/cgit/openstack/watcher-dashboard
@@ -73,4 +73,4 @@ Weekly Meetings
     IRC channel (`meetings logs`_)
 
 .. _changelog: http://eavesdrop.openstack.org/irclogs/%23openstack-watcher/
-.. _meetings logs:  http://eavesdrop.openstack.org/meetings/watcher/
+.. _meetings logs:  http://eavesdrop.openstack.org/meetings/watcher/