- some minor bugfixes
- made code more readable
- support for printing GET_BOOL type options in my_print_variables(),
  value is either TRUE or FALSE


client/mysqlbinlog.cc:
  Changes in my_getopt my_print_variables()
client/mysqlmanager-pwgen.c:
  Changes in my_getopt my_print_variables()
client/mysqlmanagerc.c:
  Changes in my_getopt my_print_variables()
client/mysqltest.c:
  Changes in my_getopt my_print_variables()
myisam/myisamchk.c:
  Changes in my_getopt my_print_variables()
mysys/my_getopt.c:
  Made code more readable.
  Fixed bug in my_print_variables().
  Added printing for options whether they are enabled or not
  FALSE / TRUE. This also separates GET_BOOL type options from
  variables that can actually take values as an argument.