Yes, I edited it by hand.  Clearly not advisable since the comments said "don't do that", but since the server wouldn't start I couldn't use ldapmodify.

On Fri, Aug 10, 2012 at 6:51 AM, Gavin Henry <ghenry@suretecsystems.com> wrote:

  Not knowing what else to do, I removed the lines containing
> "olcTLS" from /etc/ldap/slapd.d/cn=config.ldif.  Then I was able to restart
> slapd (congratulating myself) and then re-ran my ldapmodify command to enter
> the correct locations of the cert and key.  But I still get a checksum error
> in syslog:

> Aug  8 17:04:53 grackle slapd[2028]: slapd starting
> Aug  8 17:05:01 grackle slapd[2028]: ldif_read_file: checksum error on
> "/etc/ldap /slapd.d/cn=config.ldif"

So you edited this by hand?