Update links to previous Perth LCA conferences

Author: jhenstridge

content/projects/_index.md

@@ -10,6 +10,6 @@ Occasionally PLUG undertakes a project for members. Members decide what projects
  * [User Group Membership Manager](ugmm.md)
 
 ## Past Projects
- * [Linux.conf.au 2014](https://web.archive.org/web/20150317044216/http://lca2014.linux.org.au/)
+ * [Linux.conf.au 2014](https://lca2014.linux.org.au)
  * [PLUG Logo Competition 2011](logo-competition.md)
- * [Linux.conf.au 2003](https://linux.org.au/conf/2003/)
+ * [Linux.conf.au 2003](https://mirror.linux.org.au/pub/linux.conf.au/2003/)