Add missing GPL headers, and copyright claims that certainly apply.

* Fix (a subset of)? files with non-trivial code that are missing GPL headers.

* A few copyright claims added which I am certain apply, but which I had
  missed out on the original commits.

NB: Copyright claims are not exclusive and the addition of any copyright
claim should not be read as implying a lack of any further claims, or
denying the validity of any other claims.  All those with claims of
copyright over any portion of Quagga are welcome to submit them, ideally as
patches to update copyright strings in files.
diff --git a/tests/aspath_test.c b/tests/aspath_test.c
index 7fdb5e2..0e57c53 100644
--- a/tests/aspath_test.c
+++ b/tests/aspath_test.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2005 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 
 #include "vty.h"
diff --git a/tests/bgp_capability_test.c b/tests/bgp_capability_test.c
index 65c6a70..96f18f0 100644
--- a/tests/bgp_capability_test.c
+++ b/tests/bgp_capability_test.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2007 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 
 #include "vty.h"
diff --git a/tests/bgp_mp_attr_test.c b/tests/bgp_mp_attr_test.c
index aa8e485..5f0e733 100644
--- a/tests/bgp_mp_attr_test.c
+++ b/tests/bgp_mp_attr_test.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2008 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 
 #include "vty.h"
diff --git a/tests/ecommunity_test.c b/tests/ecommunity_test.c
index 87f20f2..cd1681d 100644
--- a/tests/ecommunity_test.c
+++ b/tests/ecommunity_test.c
@@ -1,3 +1,23 @@
+/* 
+ * Copyright (C) 2007 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
 #include <zebra.h>
 
 #include "vty.h"
diff --git a/tests/test-buffer.c b/tests/test-buffer.c
index b310776..e95d6fb 100644
--- a/tests/test-buffer.c
+++ b/tests/test-buffer.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2004 Paul Jakma
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 #include <memory.h>
 #include <buffer.h>
diff --git a/tests/test-checksum.c b/tests/test-checksum.c
index 921b58c..9672e95 100644
--- a/tests/test-checksum.c
+++ b/tests/test-checksum.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2008 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 #include <stdlib.h>
 #include <time.h>
diff --git a/tests/test-memory.c b/tests/test-memory.c
index 2971160..807249e 100644
--- a/tests/test-memory.c
+++ b/tests/test-memory.c
@@ -1,3 +1,22 @@
+/* 
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 #include <memory.h>
 
diff --git a/tests/test-sig.c b/tests/test-sig.c
index df023fa..7415d7a 100644
--- a/tests/test-sig.c
+++ b/tests/test-sig.c
@@ -1,3 +1,22 @@
+/* 
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 #include <sigevent.h>
 #include "lib/log.h"
diff --git a/tests/test-stream.c b/tests/test-stream.c
index 785ce58..5997b47 100644
--- a/tests/test-stream.c
+++ b/tests/test-stream.c
@@ -1,3 +1,25 @@
+/* Simple stream test.
+ * 
+ * Copyright (C) 2006 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 #include <stream.h>
 #include <thread.h>