Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/src/xz/suffix.h

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       suffix.h
+/// \brief      Checks filename suffix and creates the destination filename
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// \brief      Get the name of the destination file
+///
+/// Depending on the global variable opt_mode, this tries to find a matching
+/// counterpart for src_name. If the name can be constructed, it is allocated
+/// and returned (caller must free it). On error, a message is printed and
+/// NULL is returned.
+extern char *suffix_get_dest_name(const char *src_name);
+
+
+/// \brief      Set a custom filename suffix
+///
+/// This function calls xstrdup() for the given suffix, thus the caller
+/// doesn't need to keep the memory allocated. There can be only one custom
+/// suffix, thus if this is called multiple times, the old suffixes are freed
+/// and forgotten.
+extern void suffix_set(const char *suffix);