Cygwin: posix.xml: Mark libacl functions correctly

The functions defined by libacl, but not in POSIX.1e draft 17,
are accidentally documented as POSIX functions.  Mark them
as libacl functions instead.

Fixes: 004e95c ("Cygwin: winsup/doc/posix.xml: add missing POSIX.1e functions to docs")
Signed-off-by: Corinna Vinschen <[email protected]>

(cherry picked from commit 6e75829)

Author: github-cygwin

winsup/doc/posix.xml

@@ -1614,9 +1614,9 @@ ISO®/IEC DIS 9945 Information technology
     _toupper			(SUSv4)
     acl_add_perm		(POSIX.1e draft)
     acl_calc_mask		(POSIX.1e draft)
-    acl_check			(POSIX.1e draft)
+    acl_check			(libacl)
     acl_clear_perms		(POSIX.1e draft)
-    acl_cmp			(POSIX.1e draft)
+    acl_cmp			(libacl)
     acl_copy_entry		(POSIX.1e draft)
     acl_copy_ext		(POSIX.1e draft)
     acl_copy_int		(POSIX.1e draft)
@@ -1625,19 +1625,19 @@ ISO®/IEC DIS 9945 Information technology
     acl_delete_entry		(POSIX.1e draft)
     acl_delete_perm		(POSIX.1e draft)
     acl_dup			(POSIX.1e draft)
-    acl_entries			(POSIX.1e draft)
-    acl_equiv_mode		(POSIX.1e draft)
+    acl_entries			(libacl)
+    acl_equiv_mode		(libacl)
     acl_error			(POSIX.1e draft)
-    acl_extended_fd		(POSIX.1e draft)
-    acl_extended_file		(POSIX.1e draft)
-    acl_extended_file_nofollow	(POSIX.1e draft)
+    acl_extended_fd		(libacl)
+    acl_extended_file		(libacl)
+    acl_extended_file_nofollow	(libacl)
     acl_free			(POSIX.1e draft)
-    acl_from_mode		(POSIX.1e draft)
+    acl_from_mode		(libacl)
     acl_from_text		(POSIX.1e draft)
     acl_get_entry		(POSIX.1e draft)
     acl_get_fd			(POSIX.1e draft)
     acl_get_file		(POSIX.1e draft)
-    acl_get_perm		(POSIX.1e draft)
+    acl_get_perm		(libacl)
     acl_get_permset		(POSIX.1e draft)
     acl_get_qualifier		(POSIX.1e draft)
     acl_get_tag_type		(POSIX.1e draft)
@@ -1648,7 +1648,7 @@ ISO®/IEC DIS 9945 Information technology
     acl_set_qualifier		(POSIX.1e draft)
     acl_set_tag_type		(POSIX.1e draft)
     acl_size			(POSIX.1e draft)
-    acl_to_any_text		(POSIX.1e draft)
+    acl_to_any_text		(libacl)
     acl_to_text			(POSIX.1e draft)
     acl_valid			(POSIX.1e draft)
     atoff			(AIX)