Add link to the Diego issue

Author: beyhan

toc/rfc/rfc-draft-add-support-for-file-based-service-binding.md

@@ -15,7 +15,7 @@ The current contract between the CF platform and applications for service bindin
 ## Problem
 
 The CF platform provides Service Binding Information to hosted applications via the [VCAP_SERVICES environment variable](https://docs.cloudfoundry.org/devguide/services/application-binding.html). There are following challenges with this approach:
-- The environment variable length has a hard limit of `131072` bytes per variable which is controlled by the underlying [Linux kernel](https://github.com/torvalds/linux/blob/master/include/uapi/linux/binfmts.h). The environment variable size is defined by `MAX_ARG_STRLEN`, which is a constant with the value `PAGE_SIZE*32` where page size is `4096` bytes. This means that to change the size limit for the CF platform a recompiled kernel with updated value for `MAX_ARG_STRLEN` is required. This limit could be an issue for applications using many services. If the limit is reached by an application, it will fail to stage.
+- The environment variable length has a hard limit of `131072` bytes per variable which is controlled by the underlying [Linux kernel](https://github.com/torvalds/linux/blob/master/include/uapi/linux/binfmts.h). The environment variable size is defined by `MAX_ARG_STRLEN`, which is a constant with the value `PAGE_SIZE*32` where page size is `4096` bytes. This means that to change the size limit for the CF platform a recompiled kernel with updated value for `MAX_ARG_STRLEN` is required. This limit could be an issue for applications using many services. If the limit is reached by an application, it will fail to stage as discussed in [this issue](https://github.com/cloudfoundry/garden-runc-release/issues/160).
 - Updates of the Service Binding Information require restage. This is not optimal for an eventual support of [Binding rotation](https://github.com/openservicebrokerapi/servicebroker/blob/master/spec.md#binding-rotation) specification from the OSBI API spec.