Update postgresql-docs to be a slave port of the specified POSTGRESQL_PORT
tunable. As a perk, the plist is automatically generated.
PR: ports/48106
Submitted by: Palle Girgensohn <girgen@pingpong.net>
Add ports/databases/postgresql-docs, which will install the documentation
formerly found in ports/databases/postgresql7.
PR: 42008
Submitted by: Palle Girgensohn (maintainer)