Log Message:
Update to 4.21
+2007-05-24 10:00 Christos Zoulas <christos@zoulas.com>
+
+       * Fix another integer overflow (Colin Percival)
+
+2007-03-26 13:58 Christos Zoulas <christos@zoulas.com>
+
+       * make sure that all of struct magic_set is initialized appropriately
+         (Brett)
+
+2007-03-25 17:44 Christos Zoulas <christos@zoulas.com>
+
+       * reset left bytes in the buffer (Dmitry V. Levin)
+
+       * compilation failed with COMPILE_ONLY and ENABLE_CONDITIONALS
+         (Peter Avalos)
+
+2007-03-15 10:51 Christos Zoulas <christos@zoulas.com>
+
+       * fix fortran and nroff reversed tests (Dmitry V. Levin)
+
+       * fix exclude option (Dmitry V. Levin)