1) The page https://devmanual.gentoo.org/eclass-reference/postgres.eclass/index.html says «Exports PG_SLOT, PG_CONFIG, and PKG_CONFIG_PATH» but later PKG_CONFIG_PATH variable is not documented. 2) The page https://wiki.gentoo.org/wiki/Project:PostgreSQL have mentions of `postgres.eclass` and `postgres-multi.eclass`, but have no hyperlinks to corresponding web pages - https://devmanual.gentoo.org/eclass-reference/postgres.eclass/index.html and https://devmanual.gentoo.org/eclass-reference/postgres-multi.eclass/index.html 3) links to https://wiki.gentoo.org/wiki/PostgreSQL/QuickStart https://wiki.gentoo.org/wiki/PostgreSQL should be also added onto page of Project:PostgreSQL Reproducible: Always
