TCL error on an iRule used for ASM managment

There is a known restriction, which F5 tracked internally as ID 429063, whereby iRule data objects like HTTP::method, HTTP::uri, etc. that are normally available in the clientside context -- and accessible in the ASM_REQUEST_DONE event handler -- are not accessible when there is a "100 Continue" response before the client sends the request body.

After the 100-continue, ASM will have released the original request headers, URI, etc. and can no longer access them by the time the remainder of the request has been received and analyzed.