Added copyright messages to some files that was missing it.


Docs/manual.texi:
  Changelog
dbug/Makefile.am:
  Added missing dbug_analyze.c
dbug/monty.doc:
  Added copyright message
mysql-test/t/func_test.test:
  Moved test of IF to new file
sql/item_cmpfunc.cc:
  Fixed that IF is case insensitive if 2 and 3 arguments are case insensitive.
strings/bfill.c:
  Added copyright message
strings/bmove.c:
  Added copyright message
strings/ctype-ujis.c:
  Added copyright message
strings/strend.c:
  Added copyright message
strings/strstr.c:
  Added copyright message
strings/strxmov.c:
  Added copyright message
strings/strxnmov.c:
  Added copyright message