Backport from upstream with this commit:

    commit bc8036fc
    Author: Tom Lane <tgl@sss.pgh.pa.us>
    Date:   Fri May 11 17:57:14 2007 +0000

        Support arrays of composite types, including the rowtypes of regular tables
        and views (but not system catalogs, nor sequences or toast tables).  Get rid
        of the hardwired convention that a type's array type is named exactly "_type",
        instead using a new column pg_type.typarray to provide the linkage.  (It still
        will be named "_type", though, except in odd corner cases such as
        maximum-length type names.)

        Along the way, make tracking of owner and schema dependencies for types more
        uniform: a type directly created by the user has these dependencies, while a
        table rowtype or auto-generated array type does not have them, but depends on
        its parent object instead.

        David Fetter, Andrew Dunstan, Tom Lane