[bugfix] Properly handle range > content-length (#1979)

This makes the serveFileRange function return the entire file
if suffix-range is larger than content-length in compliance with RFC9110

Co-authored-by: mae <git@badat.dev>

internal/api/fileserver/servefile.go

@@ -208,10 +208,9 @@ func serveFileRange(rw http.ResponseWriter, r *http.Request, src io.Reader, rng
 		}
 
 		if end > size {
-			// This range exceeds length of the file, therefore unsatisfiable
-			rw.Header().Set("Content-Range", "bytes *"+strconv.FormatInt(size, 10))
-			http.Error(rw, "Unsatisfiable Range", http.StatusRequestedRangeNotSatisfiable)
-			return
+			// According to the http spec if end >= size the server should return the rest of the file
+			// https://www.rfc-editor.org/rfc/rfc9110#section-14.1.2-6
+			end = size - 1
 		}
 	} else {
 		// No end supplied, implying file end