[GSS](7.2.z) UNDERTOW-1717 - Return 416 Range Not Satisfiable when first-byte-pos of Range request header is equal to the content-length

In EAP 7/WildFly: 1. Create a static content that has a content size of 10. $ echo 0123456789 > $JBOSS_HOME/welcome-content/test.txt 2. Execute the following curl command to send a request having "Range: bytes=10-" header that a first-byte-pos is equal to the content-length. $ curl -v -r 10- http: //localhost:8080/test.txt — "416 Range Not Satisfiable" should be returned, but the following"206 Partial Content" with the "Content-Length: 0" is returned by EAP 7/WildFly (Undertow). $ curl -v -r 10- localhost:8080/test.txt ... > GET /test.txt HTTP/1.1 > Range: bytes=10- > User-Agent: curl/7.29.0 > Host: localhost:8080 > Accept: */* > < HTTP/1.1 206 Partial Content < Connection: keep-alive < Last-Modified: Wed, 27 May 2020 00:54:54 GMT < Content-Range: bytes 10-9/10 < Content-Length: 0 < Content-Type: text/plain < Accept-Ranges: bytes < Date: Wed, 27 May 2020 00:56:10 GMT <