update versions and prepare for release

pom.xml

@@ -51,7 +51,7 @@ See the Licence for the specific language governing permissions and limitations
         <maven.compiler.target>1.8</maven.compiler.target>
         <maven.compiler.source>1.8</maven.compiler.source>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <edelivery.ssl-auth.version>1.16-SNAPSHOT</edelivery.ssl-auth.version>
+        <edelivery.ssl-auth.version>1.16</edelivery.ssl-auth.version>
         <edelivery.dynamic-discovery-client.version>2.3</edelivery.dynamic-discovery-client.version>
         <bdmsl-api.version>4.3</bdmsl-api.version>
         <!-- plugin versions -->
@@ -88,7 +88,7 @@ See the Licence for the specific language governing permissions and limitations
         <hibernate.validator.version>7.0.5.Final</hibernate.validator.version>
         <hibernate.version>5.6.15.Final</hibernate.version>
         <httpclient.version>4.5.14</httpclient.version>
-        <jackson.version>2.18.0</jackson.version>
+        <jackson.version>2.18.1</jackson.version>
         <javaee-api.version>7.0</javaee-api.version>
         <javax.annotation.version>1.3.2</javax.annotation.version>
         <javax.mail.version>1.6.2</javax.mail.version>

upgrade-info.txt

-eDelivery SMP 4.2 from 4.1.1)
- - Set: smp.http.forwarded.headers.enabled to true if SMP is set behind RP/LoadBalancer
- - Make sure database user usernames are not null!
- - Copy plugin users!
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