rewrite: Force recomputing path when escaped path matches rewrite target

Thank you for the report by @MaherAzzouzi, and the suggested fix!

modules/caddyhttp/rewrite/rewrite.go

@@ -247,6 +247,7 @@ func (rewr Rewrite) Rewrite(r *http.Request, repl *caddy.Replacer) bool {
 			} else {
 				r.URL.Path = path
 			}
+			r.URL.RawPath = "" // force recomputing when EscapedPath() is called
 		}
 		if qsStart >= 0 {
 			r.URL.RawQuery = newQuery

modules/caddyhttp/rewrite/rewrite_test.go

@@ -224,6 +224,11 @@ func TestRewrite(t *testing.T) {
 			input:  newRequest(t, "GET", "/foo#fragFirst?c=d"),
 			expect: newRequest(t, "GET", "/bar#fragFirst?c=d"),
 		},
+		{
+			rule:   Rewrite{URI: "/api/admin/panel"},
+			input:  newRequest(t, "GET", "/api/admin%2Fpanel"),
+			expect: newRequest(t, "GET", "/api/admin/panel"),
+		},
 
 		{
 			rule:   Rewrite{StripPathPrefix: "/prefix"},