initdb change

Folks,

While initdb allows you to choose a directory for transaction logs, it
can't already exist, so it can't be in its usual place under $PGDATA.
I'd like to propose that this be allowed by having an alternate syntax
for the -X option, namely, "existing."

When -X is set to "existing", it would check whether pg_xlog is a
directory and the only thing in $PGDATA.  One way to do that is to add
a new return code to check_data_dir() and a new branch of the case
statement after it's called.

What say?

Cheers,
David.
-- 
David Fetter <david@fetter.org> http://fetter.org/
Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
Skype: davidfetter      XMPP: david.fetter@gmail.com

Remember to vote!
Consider donating to Postgres: http://www.postgresql.org/about/donate