Merge branch 'dev' into f-server-side-scripting

src/main/java/caosdb/datetime/UTCDateTime.java

src/main/java/caosdb/server/CaosAuthenticator.java

src/main/java/caosdb/server/CaosDBServer.java

src/main/java/caosdb/server/ServerProperties.java

...db/server/accessControl/AnonymousAuthenticationToken.java

...main/java/caosdb/server/accessControl/AnonymousRealm.java

...java/caosdb/server/accessControl/AuthenticationUtils.java

...a/caosdb/server/accessControl/CaosDBAuthorizingRealm.java

.../java/caosdb/server/accessControl/CaosDBDefaultRealm.java

...n/java/caosdb/server/accessControl/SessionTokenRealm.java

src/main/java/caosdb/server/accessControl/UserSources.java

src/main/java/caosdb/server/entity/FileProperties.java

src/main/java/caosdb/server/permissions/EntityACL.java

.../caosdb/server/resource/AbstractCaosDBServerResource.java

src/main/java/caosdb/server/resource/ScriptingResource.java

src/main/java/caosdb/server/scripting/CallerSerializer.java

src/main/java/caosdb/server/transaction/Transaction.java

src/main/java/caosdb/server/utils/Serializer.java

src/test/java/caosdb/datetime/DateTimeTest.java