Forward slashes not escaped correctly in DNs etc.

Forward slashes, "/", cause a variety of failures when included in DNs and User and Group Names.

Specific cases are:

• Adding a User or adding a Group fails when the user or group contains a "/". The failure occurs before the actual create when the system is checking to see if the user already exists. If the user or group already exists in LDAP with a name containing a slash then all other operations, e.g. authenticate & search, seem to work OK.
• When a search is performed against a DN that contains a "/" it fails with an error such as :

  javax.naming.NameNotFoundException: [LDAP: error code 32 - No Such Object]; remaining name 'ou=kelpie/berrima,dc=example,dc=com'
  

  This can be worked around by manually escaping the slash in the DN attribute e.g. ou=kelpie\2Fberrima,dc=example,dc=com

All these tests were run against OpenLDAP.