Use system <sys/xattr.h>

The one from attr is no longer installed with latest version.

ENOATTR was in fact defined as ENODATA, so switch to using that instead.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

---
Upstream status: merged:
    https://bitbucket.org/doub/flu/pull-requests/1
    https://bitbucket.org/doub/flu/commits/2d75cc2be79026b94188b11c6f53b219c24a5f70


diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/doc/doc.lua lua-flu-20150331-1/doub-flu-a7daae986339/doc/doc.lua
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/doc/doc.lua	2015-03-31 18:54:19.000000000 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/doc/doc.lua	2018-05-06 09:22:28.499324049 +0200
@@ -327,7 +327,7 @@
 				name = "fs.getxattr";
 				parameters = {"path", "name"};
 				results = {"value"};
-				doc = [[Get an extended attribute. If the attribute doesn't exist `ENOATTR` should be thrown.]];
+				doc = [[Get an extended attribute. If the attribute doesn't exist `ENODATA` should be thrown.]];
 			},
 			{
 				name = "fs.listxattr";
@@ -338,7 +338,7 @@
 			{
 				name = "fs.removexattr";
 				parameters = {"path", "name"};
-				doc = [[Remove an extended attribute. If the attribute doesn't exist `ENOATTR` should be thrown.]];
+				doc = [[Remove an extended attribute. If the attribute doesn't exist `ENODATA` should be thrown.]];
 			},
 			{
 				name = "fs.opendir";
diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/doc/luafs.lua lua-flu-20150331-1/doub-flu-a7daae986339/doc/luafs.lua
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/doc/luafs.lua	2015-03-31 18:54:19.000000000 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/doc/luafs.lua	2018-05-06 09:22:28.495324054 +0200
@@ -222,8 +222,8 @@
 -- :NOTE: since the filesystem is a pure tree (not a DAG), use the path to find attribs
 
 function luafs.getxattr(path, name)
-	local attrs = assert(xattrs[path], errno.ENOATTR)
-	return assert(attrs[name], errno.ENOATTR)
+	local attrs = assert(xattrs[path], errno.ENODATA)
+	return assert(attrs[name], errno.ENODATA)
 end
 
 function luafs.setxattr(path, name, value, flags)
@@ -236,7 +236,7 @@
 end
 
 function luafs.removexattr(path, name)
-	local attrs = assert(xattrs[path], errno.ENOATTR)
+	local attrs = assert(xattrs[path], errno.ENODATA)
 	attrs[name] = nil
 	if next(attrs)==nil then
 		xattrs[path] = nil
diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/doc/manual.html lua-flu-20150331-1/doub-flu-a7daae986339/doc/manual.html
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/doc/manual.html	2015-03-31 18:54:19.000000000 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/doc/manual.html	2018-05-06 09:22:28.499324049 +0200
@@ -347,7 +347,7 @@
 		<div class="function">
 		<h3><a name="fs.getxattr"><code>value = fs.getxattr (path, name)</code></a></h3>
 
-<p>Get an extended attribute. If the attribute doesn't exist <code>ENOATTR</code> should be thrown.</p>
+<p>Get an extended attribute. If the attribute doesn't exist <code>ENODATA</code> should be thrown.</p>
 		</div>
 
 		<div class="function">
@@ -359,7 +359,7 @@
 		<div class="function">
 		<h3><a name="fs.removexattr"><code>fs.removexattr (path, name)</code></a></h3>
 
-<p>Remove an extended attribute. If the attribute doesn't exist <code>ENOATTR</code> should be thrown.</p>
+<p>Remove an extended attribute. If the attribute doesn't exist <code>ENODATA</code> should be thrown.</p>
 		</div>
 
 		<div class="function">
diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/errno.c lua-flu-20150331-1/doub-flu-a7daae986339/errno.c
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/errno.c	2015-03-31 18:54:19.000000000 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/errno.c	2018-05-06 09:23:06.323282527 +0200
@@ -3,7 +3,7 @@
 #include <lua.h>
 #include <lauxlib.h>
 #include <stdlib.h>
-#include <attr/xattr.h>
+#include <sys/xattr.h>
 #include "compat.h"
 
 /****************************************************************************/
@@ -103,7 +103,7 @@
 	REGISTER_ERROR(EDOM)
 	REGISTER_ERROR(ERANGE)
 	REGISTER_ERROR(ENOSYS)
-	REGISTER_ERROR(ENOATTR)
+	REGISTER_ERROR(ENODATA)
 	#undef REGISTER_ERROR
 }
 
diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/flu-20150331-1.rockspec lua-flu-20150331-1/doub-flu-a7daae986339/flu-20150331-1.rockspec
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/flu-20150331-1.rockspec	2018-05-06 09:22:04.123351349 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/flu-20150331-1.rockspec	2018-05-06 09:23:06.323282527 +0200
@@ -14,7 +14,7 @@
 		library = 'fuse',
 	},
 	ATTR = {
-		header = 'attr/xattr.h',
+		header = 'sys/xattr.h',
 	},
 }
 dependencies = {
diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/flu.c lua-flu-20150331-1/doub-flu-a7daae986339/flu.c
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/flu.c	2015-03-31 18:54:19.000000000 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/flu.c	2018-05-06 09:23:06.323282527 +0200
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include <string.h>
 #include <fuse.h>
-#include <attr/xattr.h>
+#include <sys/xattr.h>
 #include <lua.h>
 #include <lauxlib.h>
 
diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/flu.rockspec.in lua-flu-20150331-1/doub-flu-a7daae986339/flu.rockspec.in
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/flu.rockspec.in	2015-03-31 18:54:19.000000000 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/flu.rockspec.in	2018-05-06 09:23:06.323282527 +0200
@@ -14,7 +14,7 @@
 		library = 'fuse',
 	},
 	ATTR = {
-		header = 'attr/xattr.h',
+		header = 'sys/xattr.h',
 	},
 }
 dependencies = {
diff -durN lua-flu-20150331-1.orig/doub-flu-a7daae986339/README.md lua-flu-20150331-1/doub-flu-a7daae986339/README.md
--- lua-flu-20150331-1.orig/doub-flu-a7daae986339/README.md	2015-03-31 18:54:19.000000000 +0200
+++ lua-flu-20150331-1/doub-flu-a7daae986339/README.md	2018-05-06 09:22:28.495324054 +0200
@@ -345,7 +345,7 @@
 
 ### `value = fs.getxattr (path, name)`
 
-Get an extended attribute. If the attribute doesn't exist `ENOATTR` should be thrown.
+Get an extended attribute. If the attribute doesn't exist `ENODATA` should be thrown.
 
 ---
 
@@ -357,7 +357,7 @@
 
 ### `fs.removexattr (path, name)`
 
-Remove an extended attribute. If the attribute doesn't exist `ENOATTR` should be thrown.
+Remove an extended attribute. If the attribute doesn't exist `ENODATA` should be thrown.
 
 ---
 
diff -durN lua-flu-20150331-1.orig/flu-20150331-1.rockspec lua-flu-20150331-1/flu-20150331-1.rockspec
--- lua-flu-20150331-1.orig/flu-20150331-1.rockspec	2015-04-02 23:44:11.000000000 +0200
+++ lua-flu-20150331-1/flu-20150331-1.rockspec	2018-05-06 09:23:06.323282527 +0200
@@ -14,7 +14,7 @@
 		library = 'fuse',
 	},
 	ATTR = {
-		header = 'attr/xattr.h',
+		header = 'sys/xattr.h',
 	},
 }
 dependencies = {