Move from /var/run/postgresql to /run/postgresql in examples
Move from /var/run/postgresql to /run/postgresql in examples

Modern Linux has moved to plain /run. See http://lwn.net/Articles/436012/

jnewmano/pq,jnewmano/pq,ympons/pq,ympons/pq,VividCortex/pq,bugreplaydev/pq,bugreplaydev/pq,lib/pq