Changed _XXX to _MY_XXX to solve conflict problem on Mac OS X


include/m_ctype.h:
  Changed _XXX to _MY_XXX to solve conflict problem on Mac OS X
include/mysql.h:
  Removed compiler warning
libmysqld/lib_sql.cc:
  Removed compiler warning
mysys/charset2html.c:
  Changed _XXX to _MY_XXX to solve conflict problem on Mac OS X
regex/regcomp.c:
  Changed _XXX to _MY_XXX to solve conflict problem on Mac OS X
sql-common/client.c:
  Indentation fix