tests: updated the test cases in t/104-req-raw-header.t to reflect the changes in nginx.

multi-line request headers are considered invalid since nginx 1.21.1.

Author: xiaocang

t/020-subrequest.t

@@ -1161,7 +1161,7 @@ r%5B%5D=http%3A%2F%2Fajax.googleapis.com%3A80%2Fajax%2Flibs%2Fjquery%2F1.7.2%2Fj
 GET /main
 --- response_body
 status: 500
-body:
+body: 
 
 
 
@@ -1182,7 +1182,7 @@ body:
 GET /main
 --- response_body
 status: 500
-body:
+body: 
 
 
 
@@ -1487,7 +1487,7 @@ post subreq: rc=0, status=200
 
 --- response_body
 status: 200
-body:
+body: 
 truncated: true
 
 --- error_log
@@ -1609,7 +1609,7 @@ post subreq: rc=0, status=200
 
 --- response_body
 status: 200
-body:
+body: 
 truncated: true
 
 --- error_log
@@ -2082,7 +2082,7 @@ post subreq: rc=0, status=200
 
 --- response_body
 status: 200
-body:
+body: 
 truncated: true
 
 --- error_log

t/104-req-raw-header.t

@@ -331,6 +331,8 @@ Foo: bar baz\r
 }
 --- no_error_log
 [error]
+--- skip_nginx
+3: >= 1.21.1
 
 
 
@@ -362,6 +364,8 @@ Connection: close\r
 --- no_error_log
 [error]
 --- timeout: 5
+--- skip_nginx
+3: >= 1.21.1
 
 
 
@@ -988,3 +992,28 @@ Connection: close
 --- no_error_log
 [error]
 --- timeout: 5
+
+
+
+=== TEST 34: multi-line header is invalid (nginx >= 1.21.1)
+--- config
+    location /t {
+        content_by_lua '
+            ngx.print(ngx.req.raw_header())
+        ';
+    }
+--- raw_request eval
+"GET /t HTTP/1.1\r
+Host: localhost\r
+Connection: close\r
+Foo: bar baz\r
+  blah\r
+\r
+"
+--- error_code: 400
+--- error_log
+client sent invalid header line: "\x20..." while reading client request headers
+--- no_error_log
+[error]
+--- skip_nginx
+3: < 1.21.1