title: ldapadd: invalid format (line 1) entry: "" when adding a schema on systems including CentOS6
body: <p>I am trying to add the schema pwm.schema to ldap and getting  below error.</p>
  
  <p>Command:</p>
  
  <pre><code>sudo ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/pwm.schema
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>SASL/EXTERNAL authentication started
  SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
  SASL SSF: 0
  ldapadd: invalid format (line 1) entry: ""
  </code></pre>
  
  <p>The file contents are below:</p>
  
  <pre><code>attributetype ( 1.3.6.1.4.1.591242.2.2010.04.16.1 NAME 'pwmEventLog'
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )
  attributetype ( 1.3.6.1.4.1.591242.2.2010.04.16.2 NAME 'pwmResponseSet'
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )
  attributetype ( 1.3.6.1.4.1.591242.2.2010.04.16.3 NAME 'pwmLastPwdUpdate'
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 )
  attributetype ( 1.3.6.1.4.1.591242.2.2010.04.16.4 NAME 'pwmGUID'
          SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
  
  objectclass ( 1.3.6.1.4.1.591242.1.2010.04.16.1 NAME 'pwmUser'
          AUXILIARY
          MAY ( dstPwdUpdate $ pwmEventLog $ pwmResponseSet $ pwmGUID
          ))
  </code></pre>