Add ability for Postgres plugin to backup via readonly node (#422)
Add ability for Postgres plugin to backup via readonly node (#422)

This commit adds two fields (host, port) for specifying a particular
node to use when backing up a Postgres cluster. When restoring, the
master IP is still used.
starkandwayne/shield,starkandwayne/shield,starkandwayne/shield,starkandwayne/shield,starkandwayne/shield