Description of problem:

When starting to try to configure a new postgresql from scratch i noticed that
the createuser program didn't work when runned from the postgres user.

After some further investigation it seems like postgres no longer recognizes the
 line

local   all     ident   sameuser

in /var/lib/pgsql/data/pg_hba.conf.

After starting the server manually with '/usr/bin/pg_ctl start' as user
'postgres' i got the following message when trying to connect to template1 as
user user postgres:

parse_hba: invalid syntax in pg_hba.conf file at line 100, token "sameuser"

as a checkpoint I added

local  all     all     trust

to pg_hba.conf, reloaded the configuration and I could then connect to the
database from localhost. (not surprising)

Version-Release number of selected component (if applicable):
postgresql-server-7.3-6

How reproducible:
always, at least on my system

Steps to Reproduce:
1. install and start postgresql-server
2. su to user postgres
3. try to use command 'createuser'
    
Actual results:

The program fails with the following error:

psql: FATAL:  Missing or erroneous pg_hba.conf file, see postmaster log for details
 
createuser: creation of user "noa" failed


Expected results:
Successfullness :)

Additional info:

note the buglet in parse_hba, there are not 100 lines in the file in question,
but rather about 50.

Also, getting the error message from postgres was a little tricky. Perhaps
redirecting pg_ctl output to /var/log/pgsql would be a good idea