Update header handling to RFC 7230

ext/standard/tests/general_functions/bug60227_2.phpt

@@ -1,14 +1,15 @@
 --TEST--
 Bug #60227 (header() cannot detect the multi-line header with CR), \r before \n
+--INI--
+expose_php=0
 --FILE--
 <?php
 header("X-foo: e\n foo");
-header("X-Foo6: e\rSet-Cookie: ID=123\n d");
 echo 'foo';
 ?>
 --EXPECTF--
+
 Warning: Header may not contain more than a single header, new line detected in %s on line %d
 foo
 --EXPECTHEADERS--
-X-foo: e
-foo
+Content-type: text/html; charset=UTF-8

ext/standard/tests/general_functions/bug60227_3.phpt

@@ -1,14 +1,14 @@
 --TEST--
 Bug #60227 (header() cannot detect the multi-line header with CR), \0 before \n
+--INI--
+expose_php=0
 --FILE--
 <?php
-header("X-foo: e\n foo");
 header("X-Foo6: e\0Set-Cookie: ID=\n123\n d");
 echo 'foo';
 ?>
 --EXPECTF--
 Warning: Header may not contain NUL bytes in %s on line %d
 foo
 --EXPECTHEADERS--
-X-foo: e
-foo
+Content-type: text/html; charset=UTF-8

ext/standard/tests/general_functions/bug60227_4.phpt

@@ -1,14 +1,14 @@
 --TEST--
 Bug #60227 (header() cannot detect the multi-line header with CR), CRLF
+--INI--
+expose_php=0
 --FILE--
 <?php
 header("X-foo: e\r\nfoo");
-header("X-foo: e\r\nfoo");
 echo 'foo';
 ?>
 --EXPECTF--
 Warning: Header may not contain more than a single header, new line detected in %s on line %d
 foo
 --EXPECTHEADERS--
-X-foo: e
- foo
+Content-type: text/html; charset=UTF-8

main/SAPI.c

@@ -743,13 +743,8 @@ SAPI_API int sapi_header_op(sapi_header_op_enum op, void *arg TSRMLS_DC)
 		/* new line/NUL character safety check */
 		int i;
 		for (i = 0; i < header_line_len; i++) {
-			/* RFC 2616 allows new lines if followed by SP or HT */
-			int illegal_break =
-					(header_line[i+1] != ' ' && header_line[i+1] != '\t')
-					&& (
-						header_line[i] == '\n'
-						|| (header_line[i] == '\r' && header_line[i+1] != '\n'));
-			if (illegal_break) {
+			/* RFC 7230 ch. 3.2.4 deprecates folding support */
+			if (header_line[i] == '\n' || header_line[i] == '\r') {
 				efree(header_line);
 				sapi_module.sapi_error(E_WARNING, "Header may not contain "
 						"more than a single header, new line detected");