UPPER/LOWER now can return a string with different length.

mi_test1.c:
  Adding new arguments.
Many files:
  Changeing caseup/casedn to return a result with different
  length than argument.
sql_string.h:
  Removing unused method,
mysql_priv.h:
  Removing unused method


strings/ctype-big5.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-bin.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-cp932.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-czech.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-euc_kr.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-extra.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-eucjpms.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-gb2312.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-gbk.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-latin1.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-mb.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-simple.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-sjis.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-tis620.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-uca.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-ucs2.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-ujis.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-utf8.c:
  Changeing caseup/casedn to return a result with different length than argument.
strings/ctype-win1250ch.c:
  Changeing caseup/casedn to return a result with different length than argument.
sql/item_strfunc.cc:
  Changeing caseup/casedn to return a result with different length than argument.
sql/item_strfunc.h:
  Changeing caseup/casedn to return a result with different length than argument.
sql/mysql_priv.h:
  Removing unused method
sql/sql_string.h:
  Removing unused method,
client/sql_string.h:
  Changeing caseup/casedn to return a result with different length than argument.
include/m_ctype.h:
  Changeing caseup/casedn to return a result with different length than argument.
myisam/mi_test1.c:
  Adding new arguments.
mysql-test/r/ctype_uca.result:
  UPPER/LOWER now can return a string with different length.
mysql-test/t/ctype_uca.test:
  UPPER/LOWER now can return a string with different length.