openldap: add initial schema for qzwiperson

this scheme extends the schema by adding the externalmail attribute.
it can be adjusted in future

data/openldap/files/qzwiperson.schema

@@ -0,0 +1,21 @@
+attributetype ( 1.3.6.1.4.1.0.1
+        NAME 'externalMail'
+        DESC 'external mail address for communication outside the org'
+        EQUALITY caseIgnoreIA5Match
+        SUBSTR caseIgnoreIA5SubstringsMatch
+        SYNTAX 1.3.6.1.4.1.1466.115.121.1.26{128}
+        SINGLE-VALUE )
+
+objectclass ( 1.3.6.1.4.1.0.2
+        NAME 'qzwiperson'
+        DESC 'own object schema to add custom values'
+        SUP top
+        AUXILIARY
+        MUST  (cn $ sn $ uid $ externalMail)
+        MAY
+        ( displayName $ givenName $ homePhone $ homePostalAddress $
+        mail $ mobile $ o $ photo $ userCertificate $
+        x500uniqueIdentifier $ preferredLanguage $
+        userSMIMECertificate $ userPKCS12 $ userPassword $
+        telephoneNumber $ description ) )
+