Need to fix one more glitch in upgrade to -10.2

Hi folks,

Today I upgraded from -9.6.6 to -10.2 on my Slackware-14.2 desktop. The
user and group IDs changed from before, but I have that all fixed now.
Starting postgres (as user postgres) succeeded, but the role for me (as a
use and owner of most databases) seems to have become lost during the
transition.

I try to open a database and see this:

$ psql jerr2018-02-17 13:45:35.852 PST [5839] FATAL: password authentication failed for user "rshepard"
2018-02-17 13:45:35.852 PST [5839] DETAIL: Role "rshepard" does not exist.
Connection matched pg_hba.conf line 80: "local all all md5"
2018-02-17 13:45:35.853 PST [5839] LOG: could not send data to client: Broken pipe

So I edited pg_hba.conf to change the method to 'trust' as I'm the only
user on this system. Ran /etc/rc.d/rc.postfix reload and see:

# /etc/rc.postgresql reload
Could not find 'postgres' binary. Maybe PostgreSQL is not installed properly?

$ ps ax | grep postgres
5826 pts/0 S 0:00 postgres -D /var/lib/pgsql/10.2/data
5828 ? Ss 0:00 postgres: checkpointer process
5829 ? Ss 0:00 postgres: writer process
5830 ? Ss 0:00 postgres: wal writer process
5831 ? Ss 0:00 postgres: autovacuum launcher process
5832 ? Ss 0:00 postgres: stats collector process
5833 ? Ss 0:00 postgres: bgworker: logical replication launcher

I would appreciate a pointer on what to check to determine why I cannot
reload postgres to see the changed pg_hba.conf and let me access my
databases.

Regards,

Rich