deps: Update to Jetty 9.2.30.v20200428

This closes #1390

.classpath

 	<classpathentry kind="lib" path="ext/slf4j-log4j12-1.7.29.jar" sourcepath="ext/src/slf4j-log4j12-1.7.29.jar" />
 	<classpathentry kind="lib" path="ext/javax.mail-1.5.1.jar" sourcepath="ext/src/javax.mail-1.5.1.jar" />
 	<classpathentry kind="lib" path="ext/javax.servlet-api-3.1.0.jar" sourcepath="ext/src/javax.servlet-api-3.1.0.jar" />
-	<classpathentry kind="lib" path="ext/jetty-all-9.2.13.v20150730.jar" sourcepath="ext/src/jetty-all-9.2.13.v20150730.jar" />
+	<classpathentry kind="lib" path="ext/jetty-all-9.2.30.v20200428.jar" sourcepath="ext/src/jetty-all-9.2.30.v20200428.jar" />
 	<classpathentry kind="lib" path="ext/wicket-1.4.22.jar" sourcepath="ext/src/wicket-1.4.22.jar" />
 	<classpathentry kind="lib" path="ext/wicket-auth-roles-1.4.22.jar" sourcepath="ext/src/wicket-auth-roles-1.4.22.jar" />
 	<classpathentry kind="lib" path="ext/wicket-extensions-1.4.22.jar" sourcepath="ext/src/wicket-extensions-1.4.22.jar" />

build.moxie

 
 # Convenience properties for dependencies
 properties: {
-  jetty.version  : 9.2.13.v20150730
+  jetty.version  : 9.2.30.v20200428
   slf4j.version  : 1.7.29
   wicket.version : 1.4.22
   lucene.version : 5.5.2

gitblit.iml

       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="jetty-all-9.2.13.v20150730.jar">
+      <library name="jetty-all-9.2.30.v20200428.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/jetty-all-9.2.13.v20150730.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/jetty-all-9.2.30.v20200428.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/jetty-all-9.2.13.v20150730.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/jetty-all-9.2.30.v20200428.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>

releases.moxie

       - Add Russian translation (pr-1343 by @vhot2076)
     dependencyChanges:
       - update to Mockito 2.28.2
+      - update to Jetty 9.2.30.v20200428
     contributors:
       - Florian Zschocke
       - David Hofmann