Add X-Powered-By header to builtin 404 page (#13092)

As requested by https://github.com/php/php-src/pull/12992/files/30929c9a887ef7917a346bfeb76c82274ad31aca#r1434156785.

Author: iluuu1994

sapi/cli/php_cli_server.c

@@ -2065,6 +2065,7 @@ static zend_result php_cli_server_send_error_page(php_cli_server *server, php_cl
 			goto fail;
 		}
 		append_essential_headers(&buffer, client, 1, NULL);
+		smart_str_appends_ex(&buffer, SAPI_PHP_VERSION_HEADER "\r\n", 1);
 		smart_str_appends_ex(&buffer, "Content-Type: text/html; charset=UTF-8\r\n", 1);
 		smart_str_appends_ex(&buffer, "Content-Length: ", 1);
 		smart_str_append_unsigned_ex(&buffer, php_cli_server_buffer_size(&client->content_sender.buffer), 1);

sapi/cli/tests/php_cli_server_013.phpt

@@ -127,6 +127,7 @@ HTTP/1.1 404 Not Found
 Host: %s
 Date: %s
 Connection: close
+X-Powered-By: PHP/%s
 Content-Type: text/html; charset=UTF-8
 Content-Length: %d
 
@@ -136,6 +137,7 @@ HTTP/1.1 404 Not Found
 Host: %s
 Date: %s
 Connection: close
+X-Powered-By: PHP/%s
 Content-Type: text/html; charset=UTF-8
 Content-Length: %d
 
@@ -145,6 +147,7 @@ HTTP/1.1 404 Not Found
 Host: %s
 Date: %s
 Connection: close
+X-Powered-By: PHP/%s
 Content-Type: text/html; charset=UTF-8
 Content-Length: %d
 
@@ -153,6 +156,7 @@ HTTP/1.1 405 Method Not Allowed
 Host: %s
 Date: %s
 Connection: close
+X-Powered-By: PHP/%s
 Content-Type: text/html; charset=UTF-8
 Content-Length: %d
 Allow: GET, HEAD, POST
@@ -163,6 +167,7 @@ HTTP/1.1 405 Method Not Allowed
 Host: %s
 Date: %s
 Connection: close
+X-Powered-By: PHP/%s
 Content-Type: text/html; charset=UTF-8
 Content-Length: %d
 Allow: GET, HEAD, POST
@@ -173,6 +178,7 @@ HTTP/1.1 405 Method Not Allowed
 Host: %s
 Date: %s
 Connection: close
+X-Powered-By: PHP/%s
 Content-Type: text/html; charset=UTF-8
 Content-Length: %d
 Allow: GET, HEAD, POST

sapi/cli/tests/php_cli_server_014.phpt

@@ -65,6 +65,7 @@ HTTP/1.1 404 Not Found
 Host: %s
 Date: %s
 Connection: close
+X-Powered-By: PHP/%s
 Content-Type: %s
 Content-Length: %d