Adding 5.0.4 to OMERO version history
Adding OMERO.matlab fix to history
Update server-postgresql.txt

adding the ip6 equivalent - my first installs on CentOS I missed this, and was baffled why the DB connection was failing - it didn't help that this wasn't in the docs.
adding ip6 connection line to pg_hba.conf

I was following the docs on my original CentOS installs, where the IP6 local connection was being tried and failing, since this was missing from the docs.
Merge pull request #964 from hflynn/5-0-4-version

Adding 5.0.4 to OMERO version history
Update auto-generated properties

Repository: openmicroscopy/ome-documentation
Already up-to-date.

Generated by OMERO-5.0-latest-docs-autogen#79 (http://ci.openmicroscopy.org/job/OMERO-5.0-latest-docs-autogen/79/)
Merge pull request #966 from snoopycrimecop/dev_5_0/latest/autogen

Update auto-generated properties
Merge pull request #968 from hflynn/rebased/dev_5_0/patch-3

adding ip6 connection line to pg_hba.conf (rebased onto dev_5_0)
Merge pull request #967 from hflynn/rebased/dev_5_0/patch-2

adding ip6 pg_hba.conf connection line (rebased onto dev_5_0)