BUG #12830: postgres-9.4 upgrade is missing PGPORT

The following bug has been logged on the website:

Bug reference:      12830
Logged by:          postgres-9.4 upgrade is missing PGPORT
Email address:      pgriboval@yahoo.fr
PostgreSQL version: 9.4.1
Operating system:   Centos 6.5
Description:

In /etc/init.d/postgresql-9.4 there is no more PGPORT defined.

You can read this comment in the script:

# Version 9.4.0 Devrim Gunduz
# Remove PGPORT variable.

But bellow this command requires the PGPORT var to be set otherwise the
upgrade script does not work

NEWPGPORT=`sed -n 's/^PGPORT=//p' /etc/init.d/postgresql-$PGMAJORVERSION`

workaround is to set back PGPORT=5433, run the upgrade script and remove the
PGPORT variabla in the script