fileinfo: Backport svg detection patch

This patch is a port of 1f5bea3 and adds a port for 5.43 based
branches. The related test is unchanged.

Signed-off-by: Anatol Belski <ab@php.net>

Author: weltling

ext/fileinfo/data_file.c

@@ -51,3 +51,26 @@ diff -ur Magdir.orig/securitycerts Magdir/securitycerts
  0	belong	0xedfeedfe	Sun 'jks' Java Keystore File data
 +
 +0	string \0volume_key	volume_key escrow packet
+diff --git a/magic/Magdir/sgml b/magic/Magdir/sgml
+--- Magdir.orig/sgml
++++ Magdir/sgml
+@@ -1,16 +1,17 @@
+ 
+ #------------------------------------------------------------------------------
+-# $File: sgml,v 1.48 2023/01/18 16:10:21 christos Exp $
++# $File: sgml,v 1.49 2023/08/05 14:34:47 christos Exp $
+ # Type:	SVG Vectorial Graphics
+ # From:	Noel Torres <tecnico@ejerciciosresueltos.com>
+-0	string		\<?xml\ version=
++0	string/bt	\<?xml\ version=
+ >14	regex		['"\ \t]*[0-9.]+['"\ \t]*
+ >>19	search/4096	\<svg			SVG Scalable Vector Graphics image
++!:strength +50
+ !:mime	image/svg+xml
+ !:ext   svg
+ >>19	search/4096	\<gnc-v2		GnuCash file
+ !:mime	application/x-gnucash
+-0	string		\<svg			SVG Scalable Vector Graphics image
++0	string/bt	\<svg			SVG Scalable Vector Graphics image
+ !:mime	image/svg+xml
+ !:ext   svg

ext/fileinfo/magicdata.patch

@@ -0,0 +1,14 @@
+--TEST--
+Bug GH-11891: fileinfo returns text/xml for some svg files
+--EXTENSIONS--
+fileinfo
+--FILE--
+<?php
+var_dump(
+    (new \finfo(\FILEINFO_MIME_TYPE))->file(
+        __DIR__ . '/bug-gh11891.svg',
+    ),
+);
+?>
+--EXPECT--
+string(13) "image/svg+xml"

ext/fileinfo/tests/bug-gh11891.phpt

@@ -35130,14 +35130,15 @@
 # $File: sgml,v 1.46 2022/08/16 11:16:39 christos Exp $
 # Type:	SVG Vectorial Graphics
 # From:	Noel Torres <tecnico@ejerciciosresueltos.com>
-0	string		\<?xml\ version=
+0	string/bt	\<?xml\ version=
 >14	regex		['"\ \t]*[0-9.]+['"\ \t]*
 >>19	search/4096	\<svg			SVG Scalable Vector Graphics image
+!:strength +50
 !:mime	image/svg+xml
 !:ext   svg
 >>19	search/4096	\<gnc-v2		GnuCash file
 !:mime	application/x-gnucash
-0	string		\<svg			SVG Scalable Vector Graphics image
+0	string/bt	\<svg			SVG Scalable Vector Graphics image
 !:mime	image/svg+xml
 !:ext   svg
 

ext/fileinfo/tests/bug-gh11891.svg

@@ -35130,14 +35130,15 @@
 # $File: sgml,v 1.46 2022/08/16 11:16:39 christos Exp $
 # Type:	SVG Vectorial Graphics
 # From:	Noel Torres <tecnico@ejerciciosresueltos.com>
-0	string		\<?xml\ version=
+0	string/bt	\<?xml\ version=
 >14	regex		['"\ \t]*[0-9.]+['"\ \t]*
 >>19	search/4096	\<svg			SVG Scalable Vector Graphics image
+!:strength +50
 !:mime	image/svg+xml
 !:ext   svg
 >>19	search/4096	\<gnc-v2		GnuCash file
 !:mime	application/x-gnucash
-0	string		\<svg			SVG Scalable Vector Graphics image
+0	string/bt	\<svg			SVG Scalable Vector Graphics image
 !:mime	image/svg+xml
 !:ext   svg