Create indexes for krbCanonicalName attribute

krbCanonicalName is for a long time among the attributes guarded by uniqueness
plugins, but there was never an index for it. Now that the attribute is really
used to store canonical principal names we need to add index for it to avoid
performance regressions.

https://fedorahosted.org/freeipa/ticket/6100

Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>

install/share/indices.ldif

@@ -269,3 +269,12 @@ ObjectClass: nsIndex
 nsSystemIndex: false
 nsIndexType: eq
 nsIndexType: pres
+
+dn: cn=krbCanonicalName,cn=index,cn=userRoot,cn=ldbm database,cn=plugins,cn=config
+changetype: add
+cn: krbCanonicalName
+objectClass: top
+objectClass: nsIndex
+nsSystemIndex: false
+nsIndexType: eq
+nsIndexType: sub

install/updates/20-indices.update

@@ -251,3 +251,11 @@ only: nsMatchingRule: caseIgnoreIA5Match
 only: nsMatchingRule: caseExactIA5Match
 only:nsIndexType: eq
 only:nsIndexType: sub
+
+dn: cn=krbCanonicalName,cn=index,cn=userRoot,cn=ldbm database,cn=plugins,cn=config
+default: cn: krbCanonicalName
+default: objectClass: top
+default: objectClass: nsIndex
+only: nsSystemIndex: false
+only: nsIndexType: eq
+only: nsIndexType: sub