ext/fileinfo/config.{m4,w32}: don't compile strcasestr.c

Unlike the upstream library, PHP's copy of libmagic doesn't use the
strcasestr() function, so there is no reason to include strcasestr.c
in the list of source files.

Author: orlitzky

ext/fileinfo/config.m4

@@ -29,11 +29,6 @@ if test "$PHP_FILEINFO" != "no"; then
 
   AC_CHECK_HEADERS([sys/sysmacros.h])
 
-  AC_CHECK_FUNCS([strcasestr],,[
-    AC_MSG_NOTICE([using libmagic strcasestr implementation])
-    libmagic_sources="$libmagic_sources libmagic/strcasestr.c"
-  ])
-
   AX_GCC_FUNC_ATTRIBUTE([visibility])
 
   PHP_NEW_EXTENSION([fileinfo],

ext/fileinfo/config.w32

@@ -8,7 +8,7 @@ if (PHP_FILEINFO != 'no') {
 			encoding.c fsmagic.c funcs.c \
 			is_json.c is_tar.c is_simh.c magic.c print.c \
 			readcdf.c softmagic.c der.c \
-			strcasestr.c buffer.c is_csv.c";
+			buffer.c is_csv.c";
 
 	EXTENSION('fileinfo', 'fileinfo.c php_libmagic.c', true, "/I" + configure_module_dirname + "/libmagic /I" + configure_module_dirname);
 	ADD_EXTENSION_DEP('fileinfo', 'pcre');