BUG #4883: tar xf fails on NFS4 mounts

The following bug has been logged online:

Bug reference:      4883
Logged by:          Alfred Monticello
Email address:      ajmcello78@gmail.com
PostgreSQL version: All
Operating system:   Linux
Description:        tar xf fails on NFS4 mounts
Details:

in doc/Makefile, tar is run to extract an archive with xf options. Needs oxf
to map to owner of person running tar, otherwise Invalid Argument occurs and
the Makefile errors out.

A better solution might be to compact postgres as UID/GID 0 instead of UID
258 which does not exist on my system.

Problem only occurs when mounting NFSv4 from a Solaris box using ZFS. Client
is Ubuntu Jaunty. Tar tries to preserve UID 258 but errors out because it
doesn't exist.