AT:

• all configuration properties that contain a link (e.g. like engines.${engineAlias}.rest or engines.${engineAlias}.webapps.endpoint) work with and without trailing slash
• all default link configurations don't have the trailing slash
• the configration section in the technical user guide is adjusted accordingly

Context:
Sometimes the user might set the webapps property as http://localhost:8080/camunda/ or http://localhost:8080/camunda. It is not clear for the user why only one version should work, since both are pointing to the same endpoint. The trailing slash shouldn't make any difference.