added set_exec_stdout and set_exec_stderr to mysqlmanager to be able 
to redirect stdout and stderr
added support for MY_FULL_IO to my_read, so we can tell it to read
a number of bytes in as many chunks as it takes instead of one try


BitKeeper/etc/ignore:
  Added client/mysqlmanager-pwgen to the ignore list
client/Makefile.am:
  mysqlmanager-pwgen
client/mysqlmanagerc.c:
  clean-up
include/my_sys.h:
  added MY_FULL_IO
mysql-test/mysql-test-run.sh:
  started on changes to use mysqlmanager
mysys/my_read.c:
  added support for MY_FULL_IO
tools/managertest1.nc:
  updated test case
tools/mysqlmanager.c:
  added set_exec_stdout and set_exec_stderr