Fix broken links (#10855)

* fix generic camera link

* fix hassbian.local link

* fix mqtt discovery link

source/_posts/2016-08-27-notifications-hue-fake-unification.markdown

@@ -253,7 +253,7 @@ Talk to you soon on Discord and in your pull request comments!
 [Wunderground]: /integrations/wunderground
 [monitoring]: /integrations/ffmpeg_motion
 [MJPEG]: /integrations/mjpeg
-[Generic]: /integrations/generic
+[Generic]: /integrations/generic_ip_camera
 [positions]: /integrations/zwave#cover
 [forecast]: /integrations/darksky
 [Bluetooth]: /integrations/bluetooth_le_tracker

source/_posts/2017-02-03-hassbian-toybox.markdown

@@ -54,7 +54,7 @@ To get started with the new image, check out the installation instructions in th
  
 [cec]: /integrations/hdmi_cec/
 [hassbian-repo]: https://github.com/home-assistant/hassbian-scripts
-[hassbian-avahi]: hassbian.local
+[hassbian-avahi]: https://hassbian.local
 [landrash-github]: https://github.com/Landrash
 [gs-image]: /docs/installation/hassbian/installation/
 [discord]: https://discord.gg/8X8DTH4

source/_posts/2017-06-04-release-46.markdown

@@ -346,7 +346,7 @@ Experiencing issues introduced by this release? Please report them in our [issue
 [media_player.spotify docs]: /integrations/spotify
 [media_player.volumio docs]: /integrations/volumio
 [modbus docs]: /integrations/modbus/
-[mqtt.discovery docs]: /integrations/mqtt.discovery/
+[mqtt.discovery docs]: /docs/mqtt/discovery/
 [notify.ios docs]: /docs/ecosystem/ios/notifications/basic/
 [notify.rest docs]: /integrations/notify.rest/
 [notify.slack docs]: /integrations/slack