[glib] gcredentials: add Hurd support

[Dan Winship <danw src gnome org>]

commit 66edac7fb9f44009cdcac68c102c77d880e139a3
Author: Dan Winship <danw gnome org>
Date:   Thu Sep 19 12:56:56 2013 -0400

    gcredentials: add Hurd support
    
    It uses the same system as FreeBSD.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=708265

 gio/gcredentials.c        |    5 +++--
 gio/gcredentialsprivate.h |    2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gio/gcredentials.c b/gio/gcredentials.c
index 8ac7a39..b18ccc4 100644
--- a/gio/gcredentials.c
+++ b/gio/gcredentials.c
@@ -59,8 +59,9 @@
  * man page for details. This corresponds to
  * %G_CREDENTIALS_TYPE_LINUX_UCRED.
  *
- * On FreeBSD, the native credential type is a <type>struct cmsgcred</type>.
- * This corresponds to %G_CREDENTIALS_TYPE_FREEBSD_CMSGCRED.
+ * On FreeBSD, Debian GNU/kFreeBSD, and GNU/Hurd, the native
+ * credential type is a <type>struct cmsgcred</type>. This corresponds
+ * to %G_CREDENTIALS_TYPE_FREEBSD_CMSGCRED.
  *
  * On OpenBSD, the native credential type is a <type>struct sockpeercred</type>.
  * This corresponds to %G_CREDENTIALS_TYPE_OPENBSD_SOCKPEERCRED.
diff --git a/gio/gcredentialsprivate.h b/gio/gcredentialsprivate.h
index 3cb8fe0..d3b5f97 100644
--- a/gio/gcredentialsprivate.h
+++ b/gio/gcredentialsprivate.h
@@ -32,7 +32,7 @@
 #define G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED 1
 #define G_CREDENTIALS_SOCKET_GET_CREDENTIALS_SUPPORTED 1
 
-#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__GNU__)
 #define G_CREDENTIALS_SUPPORTED 1
 #define G_CREDENTIALS_USE_FREEBSD_CMSGCRED 1
 #define G_CREDENTIALS_NATIVE_TYPE G_CREDENTIALS_TYPE_FREEBSD_CMSGCRED