Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxml/src/Copyright

Index: third_party/libxml/src/Copyright
diff --git a/third_party/libxml/src/Copyright b/third_party/libxml/src/Copyright
index 417e95531fd9650e1e9048695f2b56cc4424c70b..d61318502caf9587516dd9a2cb637ad9c4877f69 100644
--- a/third_party/libxml/src/Copyright
+++ b/third_party/libxml/src/Copyright
@@ -2,7 +2,7 @@ Except where otherwise noted in the source code (e.g. the files hash.c,
 list.c and the trio files, which are covered by a similar licence but
 with different Copyright notices) all the files are:
 
- Copyright (C) 1998-2003 Daniel Veillard.  All Rights Reserved.
+ Copyright (C) 1998-2012 Daniel Veillard.  All Rights Reserved.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -17,11 +17,7 @@ all copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
 NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-DANIEL VEILLARD BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
-NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of Daniel Veillard shall not
-be used in advertising or otherwise to promote the sale, use or other deal-
-ings in this Software without prior written authorization from him.
-
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.